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Elymnias panthera/ Tawny Palmfly
Elymnias panthera, the tawny palmfly, is a butterfly in the Nymphalidae family. It was described by Johan Christian Fabricius in 1787. It is found in the Indomalayan realm.
Physical Description of Adult Butterfly:
Termens of both wings are prominently scalloped. The hindwing is strongly toothed at vein 4. Above, the wings are dark brown. On the hindwing, there is a submarginal pale buff band bearing fuscous interneural (between the veins) spots. Underneath, the wings are strongly mottled brown, with the submarginal to post-discal areas pale buff. On the hindwing there is a series of black-crowned white interneural spots in spaces 1b,2,3,4,5 and 6, with the white spot in space 6 much larger and ringed in black.
The Tawny Palmfly is moderately common in Singapore and can be found in the nature reserves, forested areas of wastelands in the west, Sungei Buloh wetland reserve and Kranji nature trail. The adults are typically shade-loving, and are usually sighted flying along the edge of forested area and in the vicinity of a clump of palm trees. The adults have the habit of visiting flowers and ripened fruits of the Singapore Rhododendron for mineral and energy intakes.
The early stages of the Tawny Palmfly is polyphagous and feed on the leaves of a number of host plants in the Arecaceae (Palmae) family. Thus far, three of the local host plants haven been confirmed and identified (see list of host plants given earlier).
#nature #macrophotography #spider #jumpingspider #naturelovers #closeup #nikonsg #macro #naturelover #instanature #bug #macroworld_tr #macro_captures #nparksbuzz #closeup #nikon #singapore #igbest_macros #macroclique #macro_spotlight #natgeo #natgeoyourshot #singapore #macro_captures
Stork-billed Kingfisher
The stork-billed kingfisher (Pelargopsis capensis), is a tree kingfisher which is widely but sparsely distributed in the tropical Indian subcontinent and Southeast Asia, from India to Indonesia. This kingfisher is resident throughout its range.
It is a very large kingfisher, measuring 35 cm (14 in) in length. The adult has a green back, blue wings and tail, and olive-brown head. Its underparts and neck are buff. The very large bill and legs are bright red. The flight of the stork-billed kingfisher is laboured and flapping, but direct. Sexes are similar. There are 13 races or subspecies, differing mostly in plumage detail, but P. c. gigantea of the Sulu Archipelago in the Philippines has a white head, neck and underparts. The call of this noisy kingfisher is a low and far reaching peer-por-por repeated about every 5 seconds, as well cackling ke-ke-ke-ke-ke-ke.
The stork-billed kingfisher lives in a variety of well-wooded habitats near lakes, rivers, or coasts. It perches quietly whilst seeking food, and is often inconspicuous despite its size. It is territorial and will chase away eagles and other large predators. This species hunts fish, frogs, crabs, rodents and young birds.
Adults dig their nests in river banks, decaying trees, or tree termite nests. A clutch of two to five round white eggs is typical.
Brahminy Kite/ Red-Backed Sea Eagle - With Prey
The brahminy kite (Haliastur indus), also known as the red-backed sea-eagle in Australia, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors, such as eagles, buzzards, and harriers. They are found in the Indian subcontinent, Southeast Asia, and Australia. They are found mainly on the coast and in inland wetlands where they feed on dead fish and other prey. Adults have a reddish-brown plumage and a contrasting white head and breast which makes them easy to distinguish from other birds of prey.
The brahminy kite is distinctive and contrastingly coloured, with chestnut plumage except for the white head and breast and black wing tips. The juveniles are browner, but can be distinguished from both the resident and migratory races of black kites in Asia by the paler appearance, shorter wings, and rounded tail. The pale patch on the underwing carpal region is of a squarish shape and separated from Buteo buzzards.
The brahminy kite is about the same size as the black kite (Milvus migrans) and has a typical kite flight, with wings angled, but its tail is rounded unlike the Milvus species, red kite, and black kite, which have forked tails. The two genera are however very close.
The call is a mewing keeyew.
This kite is a familiar sight in the skies of Sri Lanka, Nepal, India, Pakistan, Bangladesh, and southeast Asia and as far south as New South Wales, Australia, through which region it is widespread and resident. They perform seasonal movements associated with rainfall in some parts of their range.
They are mainly seen in the plains but can sometimes occur above 5000 feet in the Himalayas.
It is evaluated as being of least concern on the IUCN Red List of Threatened Species. However the species is on the decline in some parts such as Java.
Pink-necked Green Pigeon - Golden Hour
The pink-necked green pigeon (Treron vernans) is a bird of the Columbidae family. It is found in Cambodia, Indonesia, Brunei, Malaysia, Myanmar, the Philippines, Singapore, Thailand, and Vietnam. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical mangrove forests, and subtropical or tropical moist montane forests.
Male has mostly green plumage with greyish head, pinkish nape, neck and upper breast, orange central breast and dark chestnut undertail-coverts. Female lacks the pinkish and orange plumage of the male. Juvenile of both sexes resembles female but male will soon start to show patches of adult plumage.
Habitat: Forests, mangroves, wooded areas, gardens and parks.
Ecology/Behaviour: Arboreal, seldom come to the ground except to drink.
White-Breasted Waterhen - when breakfast is on the table
The white-breasted waterhen (Amaurornis phoenicurus) is a waterbird of the rail and crake family, Rallidae, that is widely distributed across Southeast Asia and the Indian Subcontinent. They are dark slaty birds with a clean white face, breast and belly. They are somewhat bolder than most other rails and are often seen stepping slowly with their tail cocked upright in open marshes or even drains near busy roads. They are largely crepuscular in activity and during the breeding season, just after the first rains, make loud and repetitive croaking calls.
Adult white-breasted waterhens have mainly dark grey upperparts and flanks, and a white face, neck and breast. The lower belly and undertail are cinnamon coloured. The body is flattened laterally to allow easier passage through the reeds or undergrowth. They have long toes, a short tail and a yellow bill and legs. Sexes are similar but females measure slightly smaller. Immature birds are much duller versions of the adults. The downy chicks are black, as with all rails.
Several subspecies are named for the populations that are widely distributed. The nominate subspecies is described from Sri Lanka but is often widened to include chinensis of mainland India and adjoining regions in Asia, west to Arabia and east nearly to Japan. The remaining subspecies are those from islands and include insularis of the Andaman and Nicobar Islands, midnicobaricus of the central Nicobars, leucocephala of Car Nicobar, maldivus of the Maldives, javanicus of Java and leucomelanus of Sulawesi and the Lesser Sundas.
Their breeding habitat is marshes across south Asia from Pakistan, Maldives, India, Bangladesh, and Sri Lanka to south China, Philippines, and Indonesia. They are mainly seen in the plains but have been known from the higher hills such as in Nainital (1300m) and the High Range (1500m) in Kerala. These large 32 cm long rails are permanent residents throughout their range. They make short distance movements and are known to colonize new areas. They have been noted as some of the early colonizers on the volcanic island of Rakata. Although most often found near freshwater, they are also found near brackish water and even the seashore when there is no freshwater as on the volcanic Barren Island in the Andamans.
These birds are usually seen singly or in pairs as they forage slowly along the edge of a waterbody mainly on the ground but sometimes clambering up low vegetation. The tail is held up and jerked as they walk. They probe with their bill in mud or shallow water, also picking up food by sight. They mainly eat insects (large numbers of beetles have been recorded), small fish (which are often carefully washed in water), aquatic invertebrates and grains or seeds such as those of Pithecolobium dulce. They may sometimes feed in deeper water in the manner of a moorhen.
The nesting season is mainly June to October but varies locally. They nest in a dry location on the ground in marsh vegetation, laying 6-7 eggs. Courtship involves bowing, billing and nibbling. The eggs hatch in about 19 days. Both sexes incubate the eggs and take care of the chicks. Chicks often dive underwater to escape predation. Adults are said to build a roost or brood nest where young chicks and the adults roost.
Many rails are very secretive, but white-breasted waterhens are often seen out in the open. They can be noisy especially at dawn and dusk, with loud croaky calls. The Andamans population insularis is said to make duck like quack calls
Brahminy Kite/ Red-Backed Sea Eagle - With Prey
The brahminy kite (Haliastur indus), also known as the red-backed sea-eagle in Australia, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors, such as eagles, buzzards, and harriers. They are found in the Indian subcontinent, Southeast Asia, and Australia. They are found mainly on the coast and in inland wetlands where they feed on dead fish and other prey. Adults have a reddish-brown plumage and a contrasting white head and breast which makes them easy to distinguish from other birds of prey.
The brahminy kite is distinctive and contrastingly coloured, with chestnut plumage except for the white head and breast and black wing tips. The juveniles are browner, but can be distinguished from both the resident and migratory races of black kites in Asia by the paler appearance, shorter wings, and rounded tail. The pale patch on the underwing carpal region is of a squarish shape and separated from Buteo buzzards.
The brahminy kite is about the same size as the black kite (Milvus migrans) and has a typical kite flight, with wings angled, but its tail is rounded unlike the Milvus species, red kite, and black kite, which have forked tails. The two genera are however very close.
The call is a mewing keeyew.
This kite is a familiar sight in the skies of Sri Lanka, Nepal, India, Pakistan, Bangladesh, and southeast Asia and as far south as New South Wales, Australia, through which region it is widespread and resident. They perform seasonal movements associated with rainfall in some parts of their range.
They are mainly seen in the plains but can sometimes occur above 5000 feet in the Himalayas.
It is evaluated as being of least concern on the IUCN Red List of Threatened Species. However the species is on the decline in some parts such as Java.
Brahminy Kite/ Red-Backed Sea Eagle - With Prey
The brahminy kite (Haliastur indus), also known as the red-backed sea-eagle in Australia, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors, such as eagles, buzzards, and harriers. They are found in the Indian subcontinent, Southeast Asia, and Australia. They are found mainly on the coast and in inland wetlands where they feed on dead fish and other prey. Adults have a reddish-brown plumage and a contrasting white head and breast which makes them easy to distinguish from other birds of prey.
The brahminy kite is distinctive and contrastingly coloured, with chestnut plumage except for the white head and breast and black wing tips. The juveniles are browner, but can be distinguished from both the resident and migratory races of black kites in Asia by the paler appearance, shorter wings, and rounded tail. The pale patch on the underwing carpal region is of a squarish shape and separated from Buteo buzzards.
The brahminy kite is about the same size as the black kite (Milvus migrans) and has a typical kite flight, with wings angled, but its tail is rounded unlike the Milvus species, red kite, and black kite, which have forked tails. The two genera are however very close.
The call is a mewing keeyew.
This kite is a familiar sight in the skies of Sri Lanka, Nepal, India, Pakistan, Bangladesh, and southeast Asia and as far south as New South Wales, Australia, through which region it is widespread and resident. They perform seasonal movements associated with rainfall in some parts of their range.
They are mainly seen in the plains but can sometimes occur above 5000 feet in the Himalayas.
It is evaluated as being of least concern on the IUCN Red List of Threatened Species. However the species is on the decline in some parts such as Java.
Brahminy Kite/ Red-Backed Sea Eagle
The brahminy kite (Haliastur indus), also known as the red-backed sea-eagle in Australia, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors, such as eagles, buzzards, and harriers. They are found in the Indian subcontinent, Southeast Asia, and Australia. They are found mainly on the coast and in inland wetlands where they feed on dead fish and other prey. Adults have a reddish-brown plumage and a contrasting white head and breast which makes them easy to distinguish from other birds of prey.
The brahminy kite is distinctive and contrastingly coloured, with chestnut plumage except for the white head and breast and black wing tips. The juveniles are browner, but can be distinguished from both the resident and migratory races of black kites in Asia by the paler appearance, shorter wings, and rounded tail. The pale patch on the underwing carpal region is of a squarish shape and separated from Buteo buzzards.
The brahminy kite is about the same size as the black kite (Milvus migrans) and has a typical kite flight, with wings angled, but its tail is rounded unlike the Milvus species, red kite, and black kite, which have forked tails. The two genera are however very close.
The call is a mewing keeyew.
This kite is a familiar sight in the skies of Sri Lanka, Nepal, India, Pakistan, Bangladesh, and southeast Asia and as far south as New South Wales, Australia, through which region it is widespread and resident. They perform seasonal movements associated with rainfall in some parts of their range.
They are mainly seen in the plains but can sometimes occur above 5000 feet in the Himalayas.
It is evaluated as being of least concern on the IUCN Red List of Threatened Species. However the species is on the decline in some parts such as Java.
Snowy Egret with Shrimp
The snowy egret (Egretta thula) is a small white heron. The genus name comes from the Provençal French for the little egret aigrette, a diminutive of aigron, "heron". The species name thula is the Araucano for the Black-necked Swan, applied to this species in error by Chilean naturalist Juan Ignacio Molina in 1782.
The snowy egret is the American counterpart to the very similar Old World little egret, which has established a foothold in the Bahamas. At one time, the beautiful plumes of the snowy egret were in great demand by market hunters as decorations for women's hats. This reduced the population of the species to dangerously low levels.[citation needed] Now protected in the United States by law, under the Migratory Bird Treaty Act, this bird's population has rebounded.
Adults are typically 61 cm (24 in) long and weigh 375 g (0.827 lb) They have a slim black bill and long black legs with yellow feet. The area of the upper bill, in front of the eyes, is yellow but turns red during the breeding season, when the adults also gain recurved plumes on the back, making for a "shaggy" effect. The juvenile looks similar to the adult, but the base of the bill is paler, and a green or yellow line runs down the back of the legs.
Snowy egrets nest in colonies on thick vegetation in isolated places, such as barrier islands, dredge-spoil islands, salt marsh islands, swamps, and marshes. They often change location from year to year. During the breeding season, snowy egrets feed in estuaries, saltmarshes, tidal channels, shallow bays, and mangroves. They winter in mangroves, saltwater lagoons, freshwater swamps, grassy ponds, and temporary pools, and forage on beaches, shallow reefs, and wet fields.
The snowy egret eats mostly aquatic animals, including fish, frogs, worms, crustaceans, and insects. It often uses its bright yellow feet to paddle in the water or probe in the mud, rounding up prey before striking with its bill. Snowy egrets feed while standing, walking, running, or hopping, and they may vibrate their bills, sway their heads, or flick their wings as part of prey gathering. They even forage while hovering. Snowy egrets forage in saltmarsh pools, tidal channels, tidal flats, freshwater marshes, swamps, ocean inlets, and lake edges, usually preferring brackish or marine habitats with shallow water. Other foraging water birds often assemble around them to form mixed-species foraging groups.
Snowy egrets are permanent residents in most of South America and Central America. In the United States, they are often permanent residents along the Atlantic coast north to Virginia Beach, Virginia, along the Gulf Coast, and along the Pacific lowlands from central California southward. During the breeding season, snowy egrets wander north along the Atlantic flyway between the lower Chesapeake Bay and coastal Rhode Island, and up the Pacific Coast to northern California. Snowy egrets also breed in the lower Mississippi Valley westward into eastern Texas. Birds banded in United States have been recovered as far away as Panama and Trinidad.
The birds eat fish, crustaceans, insects, small reptiles, snails, frogs, worms, mice and crayfish. They stalk prey in shallow water, often running or shuffling their feet, flushing prey into view, as well "dip-fishing" by flying with their feet just over the water. Snowy egrets may also stand still and wait to ambush prey, or hunt for insects stirred up by domestic animals in open fields.
Panoramic view at Bishan Ang Ko Kio Park. Acceptable quality with some distortion but not noticeable unless you zoom into details.
The Kallang River runs through the park in front of the Recycle Hill where the sculpture uncalled The Swing was visible in front of the public flats.
Stork-billed Kingfisher
The stork-billed kingfisher (Pelargopsis capensis), is a tree kingfisher which is widely but sparsely distributed in the tropical Indian subcontinent and Southeast Asia, from India to Indonesia. This kingfisher is resident throughout its range.
It is a very large kingfisher, measuring 35 cm (14 in) in length. The adult has a green back, blue wings and tail, and olive-brown head. Its underparts and neck are buff. The very large bill and legs are bright red. The flight of the stork-billed kingfisher is laboured and flapping, but direct. Sexes are similar. There are 13 races or subspecies, differing mostly in plumage detail, but P. c. gigantea of the Sulu Archipelago in the Philippines has a white head, neck and underparts. The call of this noisy kingfisher is a low and far reaching peer-por-por repeated about every 5 seconds, as well cackling ke-ke-ke-ke-ke-ke.
The stork-billed kingfisher lives in a variety of well-wooded habitats near lakes, rivers, or coasts. It perches quietly whilst seeking food, and is often inconspicuous despite its size. It is territorial and will chase away eagles and other large predators. This species hunts fish, frogs, crabs, rodents and young birds.
Adults dig their nests in river banks, decaying trees, or tree termite nests. A clutch of two to five round white eggs is typical.
Brahminy Kite/ Red-Backed Sea Eagle - With Prey and the approach & turn 4
The brahminy kite (Haliastur indus), also known as the red-backed sea-eagle in Australia, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors, such as eagles, buzzards, and harriers. They are found in the Indian subcontinent, Southeast Asia, and Australia. They are found mainly on the coast and in inland wetlands where they feed on dead fish and other prey. Adults have a reddish-brown plumage and a contrasting white head and breast which makes them easy to distinguish from other birds of prey.
The brahminy kite is distinctive and contrastingly coloured, with chestnut plumage except for the white head and breast and black wing tips. The juveniles are browner, but can be distinguished from both the resident and migratory races of black kites in Asia by the paler appearance, shorter wings, and rounded tail. The pale patch on the underwing carpal region is of a squarish shape and separated from Buteo buzzards.
The brahminy kite is about the same size as the black kite (Milvus migrans) and has a typical kite flight, with wings angled, but its tail is rounded unlike the Milvus species, red kite, and black kite, which have forked tails. The two genera are however very close.
The call is a mewing keeyew.
This kite is a familiar sight in the skies of Sri Lanka, Nepal, India, Pakistan, Bangladesh, and southeast Asia and as far south as New South Wales, Australia, through which region it is widespread and resident. They perform seasonal movements associated with rainfall in some parts of their range.
They are mainly seen in the plains but can sometimes occur above 5000 feet in the Himalayas.
It is evaluated as being of least concern on the IUCN Red List of Threatened Species. However the species is on the decline in some parts such as Java.
Brahminy Kite/ Red-Backed Sea Eagle
The brahminy kite (Haliastur indus), also known as the red-backed sea-eagle in Australia, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors, such as eagles, buzzards, and harriers. They are found in the Indian subcontinent, Southeast Asia, and Australia. They are found mainly on the coast and in inland wetlands where they feed on dead fish and other prey. Adults have a reddish-brown plumage and a contrasting white head and breast which makes them easy to distinguish from other birds of prey.
The brahminy kite is distinctive and contrastingly coloured, with chestnut plumage except for the white head and breast and black wing tips. The juveniles are browner, but can be distinguished from both the resident and migratory races of black kites in Asia by the paler appearance, shorter wings, and rounded tail. The pale patch on the underwing carpal region is of a squarish shape and separated from Buteo buzzards.
The brahminy kite is about the same size as the black kite (Milvus migrans) and has a typical kite flight, with wings angled, but its tail is rounded unlike the Milvus species, red kite, and black kite, which have forked tails. The two genera are however very close.
The call is a mewing keeyew.
This kite is a familiar sight in the skies of Sri Lanka, Nepal, India, Pakistan, Bangladesh, and southeast Asia and as far south as New South Wales, Australia, through which region it is widespread and resident. They perform seasonal movements associated with rainfall in some parts of their range.
They are mainly seen in the plains but can sometimes occur above 5000 feet in the Himalayas.
It is evaluated as being of least concern on the IUCN Red List of Threatened Species. However the species is on the decline in some parts such as Java.
White-Breasted Waterhen
The white-breasted waterhen (Amaurornis phoenicurus) is a waterbird of the rail and crake family, Rallidae, that is widely distributed across Southeast Asia and the Indian Subcontinent. They are dark slaty birds with a clean white face, breast and belly. They are somewhat bolder than most other rails and are often seen stepping slowly with their tail cocked upright in open marshes or even drains near busy roads. They are largely crepuscular in activity and during the breeding season, just after the first rains, make loud and repetitive croaking calls.
Adult white-breasted waterhens have mainly dark grey upperparts and flanks, and a white face, neck and breast. The lower belly and undertail are cinnamon coloured. The body is flattened laterally to allow easier passage through the reeds or undergrowth. They have long toes, a short tail and a yellow bill and legs. Sexes are similar but females measure slightly smaller. Immature birds are much duller versions of the adults. The downy chicks are black, as with all rails.
Several subspecies are named for the populations that are widely distributed. The nominate subspecies is described from Sri Lanka but is often widened to include chinensis of mainland India and adjoining regions in Asia, west to Arabia and east nearly to Japan. The remaining subspecies are those from islands and include insularis of the Andaman and Nicobar Islands, midnicobaricus of the central Nicobars, leucocephala of Car Nicobar, maldivus of the Maldives, javanicus of Java and leucomelanus of Sulawesi and the Lesser Sundas.
Their breeding habitat is marshes across south Asia from Pakistan, Maldives, India, Bangladesh, and Sri Lanka to south China, Philippines, and Indonesia. They are mainly seen in the plains but have been known from the higher hills such as in Nainital (1300m) and the High Range (1500m) in Kerala. These large 32 cm long rails are permanent residents throughout their range. They make short distance movements and are known to colonize new areas. They have been noted as some of the early colonizers on the volcanic island of Rakata. Although most often found near freshwater, they are also found near brackish water and even the seashore when there is no freshwater as on the volcanic Barren Island in the Andamans.
These birds are usually seen singly or in pairs as they forage slowly along the edge of a waterbody mainly on the ground but sometimes clambering up low vegetation. The tail is held up and jerked as they walk. They probe with their bill in mud or shallow water, also picking up food by sight. They mainly eat insects (large numbers of beetles have been recorded), small fish (which are often carefully washed in water), aquatic invertebrates and grains or seeds such as those of Pithecolobium dulce. They may sometimes feed in deeper water in the manner of a moorhen.
The nesting season is mainly June to October but varies locally. They nest in a dry location on the ground in marsh vegetation, laying 6-7 eggs. Courtship involves bowing, billing and nibbling. The eggs hatch in about 19 days. Both sexes incubate the eggs and take care of the chicks. Chicks often dive underwater to escape predation. Adults are said to build a roost or brood nest where young chicks and the adults roost.
Many rails are very secretive, but white-breasted waterhens are often seen out in the open. They can be noisy especially at dawn and dusk, with loud croaky calls. The Andamans population insularis is said to make duck like quack calls
Olive-winged Bulbul
The olive-winged bulbul (Pycnonotus plumosus) is a member of the bulbul family of passerine birds. It is found in south-eastern Asia and the Greater Sunda Islands. Its natural habitat is subtropical or tropical moist lowland forests.
Until 2010, the ashy-fronted bulbul was also considered as a subspecies of the olive-winged bulbul.
Four subspecies are recognized:
P. f. porphyreus - Oberholser, 1912: Found on western Sumatra and nearby islands
P. f. plumosus - Blyth, 1845: Found on Malay Peninsula, eastern Sumatra, Java, Bali and western and southern Borneo
P. f. hutzi - Stresemann, 1938: Found on northern and eastern Borneo
P. f. hachisukae - Deignan, 1952: Found on islands off northern Borneo and south-western Philippines
Oriental Pied Hornbill
The oriental pied hornbill (Anthracoceros albirostris) is an Indo-Malayan pied hornbill, a large canopy-dwelling bird belonging to the Bucerotidae family. Two other common names for this species are sunda pied hornbill (convexus) and Malaysian pied hornbill. The species is considered to be among the smallest and most common of the Asian hornbills. It has the largest distribution in the genus and is found in the Indian Subcontinent and throughout Southeast Asia. Its natural habitat is subtropical or tropical moist lowland forests. The oriental pied hornbill's diet includes fruit, insects and small reptiles.
The Oriental hornbill, of the family Bucerotidae, belongs to the genus Anthracoceros, which consists of five species. Species in this genus are divided into two groups, Indo-Malayan pied hornbills and black hornbills. A. albirostris is grouped under the Indo-Malayan pied hornbills, based on plumage similarities, along with the Indian pied hornbill (A. coronatus) and the Palawan hornbill (A. marchei). The black hornbills include A. malayanus and A. montani. A. albirostris can be further categorized into two subspecies, A. a. albirostris and A. a. convexus.
The oriental pied hornbill is a medium size frugivore with a head-to-tail length of 55–60 cm from head to tail and a wingspan of 23–36 cm. The bill measures 19 cm for males and 16 cm for females. It can weigh between 600 g and 1,050 g, averaging 900 g for males and 875 g for females. The plumage of the head, neck, back, wings and upper breast is black with a slight green sheen. The tail is black with white tips on all the feathers except the central feathers (rectories). The plumage of their lower breast, lower abdomen, thighs, under-wing and all the tips of the wings except the three basal secondaries and two outer primaries is white, as is the circumorbital skin around the eyes and on the throat skin. A blue tinge can sometimes be noticed on the throat of adults. Casques of mature A. albirostri are laterally flattened “cylinders”, which may form a protruding horn. Males and females are similar in coloration. Males can be distinguished from females by their larger body size, yellow bill, which has a black base, and bright red eyes. Females have a slightly smaller body size, a yellow bill and casque with a partly black, browned patched mandible, and grayish-brown eyes. Juvenile A. albirostris resemble the adults, but have an undeveloped casque and a smaller bill. Their black plumage lacks the green gloss found on adults.
The calls of the oriental pied hornbill have been described as crowlike sounds, braying sounds or harsh crackles and screeches
The oriental pied hornbill is found in the Indian Subcontinent and Southeast Asia, ranging across Bangladesh, Bhutan, Brunei, Cambodia, Eastern and Northern India, Indonesia, Laos, North peninsular Malaysia, Myanmar, Nepal, Singapore, Thailand, Tibet, Vietnam and the Sunda shelf islands. Its natural habitat is subtropical or tropical moist lowland forests. Within these regions, A. albirostris occupies various habitat types, which include dry and semi-evergreen forests, dry and moist deciduous forests, subtropical broadleaf forests, secondary forests, plantations and woodlands.
The species has an extremely wide range and appears to be the hornbill species most adaptable to habitat alterations; it is thus not currently considered to be threatened. What declines in oriental pied hornbill population have been reported are mainly caused by legal and illegal logging, which decreases the availability of suitable nesting and fruiting trees. A. albirostris are subject to some hunting pressure (casques are sold as souvenirs) and are popular as pets in some areas. It has also been noted that the species has been almost completely extirpated from southern China.
Conservation efforts such as captive breeding and reintroduction are currently in practice. Breeding in captivity of has so far shown a low success rate. In some areas such as Cambodia, artificial nests made from iron tanks are installed in nesting sites to provide alternative nesting sites for hornbills when natural nest-site availability is low and to aid reintroduction.
The saltwater crocodile (Crocodylus porosus), also known as the estuarine crocodile, Indo-Pacific crocodile, marine crocodile, sea crocodile or informally as saltie, is the largest of all living reptiles, as well as the largest riparian predator in the world. Males of this species can reach sizes up to 6.30 m (20.7 ft) and possibly up to 7.0 m (23.0 ft) in length. However, an adult male saltwater crocodile rarely reaches or exceeds a size of 6 m (19.7 ft) weighing 1,000 to 1,200 kg (2,200–2,600 lb). Females are much smaller and often do not surpass 3 m (9.8 ft).
As its name implies, this species of crocodile can live in marine environments, but usually resides in saline and brackish mangrove swamps, estuaries, deltas, lagoons, and lower stretches of rivers. They have the broadest distribution of any modern crocodile, ranging from the eastern coast of India throughout most of Southeast Asia and northern Australia.
The saltwater crocodile is a large and opportunistic hypercarnivorous apex predator. Most prey are ambushed and then drowned or swallowed whole. It is capable of prevailing over almost any animal that enters its territory, including other apex predators such as sharks, varieties of freshwater and marine fish including pelagic species, invertebrates such as crustaceans, various reptiles, birds and mammals, including humans. Due to their size, aggression and distribution, saltwater crocodiles are regarded as the most dangerous extant crocodilian to humans, alongside the Nile crocodile.
Incomplete fossil records make it difficult to accurately trace the emergence of the species. The genome was fully sequenced in 2007. The earliest fossil evidence of the species dates to around 4.0–4.5 million years ago and no subspecies are known. Scientists estimate that C. porosus is an ancient species that could have diverged from 12 to 6 million years ago. Genetic research has unsurprisingly indicated that the saltwater crocodile is related relatively closely to other living species of Asian crocodile, although some ambiguity exists over what assemblage it could be considered part of based on variable genetic results. Other relatively broad-snouted species such as mugger (C. palustris) and Siamese crocodiles (C. siamensis) seem to be the most likely candidates to bear the closest relation among living species.
The saltwater crocodile has a wide snout compared to most crocodiles. However, it has a longer muzzle than the mugger crocodile; its length is twice its width at the base. The saltwater crocodile has fewer armour plates on its neck than other crocodilians. On this species, a pair of ridges runs from the eyes along the centre of the snout. The scales are oval in shape and the scutes are either small compared to other species or commonly are entirely absent. In addition, an obvious gap is also present between the cervical and dorsal shields, and small, triangular scutes are present between the posterior edges of the large, transversely arranged scutes in the dorsal shield. The relative lack of scutes is considered an asset useful to distinguish saltwater crocodiles in captivity or in illicit leather trading, as well as in the few areas in the field where sub-adult or younger saltwater crocodiles may need to be distinguished from other crocodiles.
The species is considered of minimal concern for extinction. Currently, the species is listed in CITES as follows:
Appendix I (prohibiting all commercial trade in the species or its byproducts): All wild populations except for those of Australia, Indonesia and Papua New Guinea;
Appendix II (commercial trade allowed with export permit; import permits may or may not be required depending on the laws of the importing country): Australia, Indonesia and Papua New Guinea wild populations, plus all worldwide populations bred in captivity for commercial purposes.
The saltwater crocodile was often hunted for its meat and eggs, and its skin is the most commercially valuable of any crocodilian. Unregulated hunting during the 20th century caused a dramatic decline in the species throughout its range, with the population in northern Australia reduced by 95% by 1971. The years from 1940 to 1970 were the peak of unregulated hunting and may have regionally caused irreparable damage to saltwater crocodile populations. The species currently has full legal protection in all Australian states and territories where it is found – Western Australia (since 1970), Northern Territory (since 1971) and Queensland (since 1974). Illegal hunting still persists in some areas, with protection in some countries being grossly ineffective, and trade is often difficult to monitor and control over such a vast range. However, many areas have not recovered; some population surveys have shown that although young crocodiles are present, fewer than 10% of specimens spotted are in adult size range and include no particularly large males, such as Sri Lanka or the Republic of Palau. This is indicative of both potential continued persecution and exploitation and a non-recovered breeding population. In a more balanced population, such as those from Bhitarkanika National Park or Sabah, Malaysia, 28% and 24.2% of specimens observed were in the adult size range of more than 3 m (9 ft 10 in).
Habitat loss continues to be a major problem for the species. In northern Australia, much of the nesting habitat of the saltwater crocodile is susceptible to trampling by feral water buffalo, although buffalo eradication programs have now reduced this problem considerably. Even where large areas of suitable habitat remain, subtle habitat alterations can be a problem, such as in the Andaman Islands, where freshwater areas, used for nesting, are being increasingly converted to human agriculture. After the commercial value of crocodile skins waned, perhaps the greatest immediate challenge to implementing conservation efforts has been the occasional danger the species can pose to humans, and the resulting negative view of the crocodile.
Crimson Sunbird
Preying on an insect.
The crimson sunbird (Aethopyga siparaja) is a species of bird in the sunbird family which feed largely on nectar, although they will also take insects, especially when feeding the young. Flight is fast and direct on their short wings. Most species can take nectar by hovering like a hummingbird, but usually perch to feed most of the time.
The crimson sunbird is a resident breeder in tropical southern Asia from India, through Bangladesh and Myanmar to Indonesia. Two or three eggs are laid in a suspended nest in a tree. This species occurs in forest and cultivated areas.
Crimson sunbirds are tiny, only 11 cm long. They have medium-length thin down-curved bills and brush-tipped tubular tongues, both adaptations to their nectar feeding.
The adult male has a crimson breast and maroon back. The rump is yellow and the belly is olive. The female has an olive-green back, yellowish breast and white tips to the outer tail feathers.
In most of the range, males have a long green-blue tail, but A.s. nicobarica of the Nicobar Islands and the former subspecies A. vigorsii (Western crimson sunbird) of the Western Ghats of India lack the long central tail feathers. Their call is chee-cheewee.
The crimson sunbird has become the unofficial national bird of Singapore.
Varanus salvator, commonly known as the water monitor, is a large lizard native to South and Southeast Asia. Water monitors are one of the most common monitor lizards found throughout Asia. They range from Sri Lanka and coastal northeast India to Indochina, the Malay Peninsula, and various islands of Indonesia, living in areas close to water.
The species is known as Malayan water monitor, Asian water monitor, common water monitor, two-banded monitor, and as rice lizard, ring lizard, plain lizard and no-mark lizard, as well as simply "water monitor".
The water monitor is a large species of monitor lizard. Breeding maturity is attained for males when they are a relatively modest 40 cm (16 in) long and weigh 1 kg (2.2 lb), and for females at 50 cm (20 in). However, they grow much larger throughout life, with males being larger than females. Adults rarely exceed 1.5–2 m (4.9–6.6 ft) in length, but the largest specimen on record, from Sri Lanka, measured 3.21 m (10.5 ft). A common mature weight of V. salvator can be 19.5 kg (43 lb). However, 80 males killed for the leather trade in Sumatra averaged only 3.42 kg (7.5 lb) and 56.6 cm (22.3 in) snout-to-vent and 142 cm (56 in) in total length; 42 females averaged only 3.52 kg (7.8 lb) and 59 cm (23 in) snout-to-vent and 149.6 cm (58.9 in) in total length, although unskinned outsized specimens weighed 16 to 20 kg (35 to 44 lb). Another study from the same area by the same authors similarly estimated mean body mass for mature specimens at 20 kg (44 lb) while yet another study found a series of adults to weigh 7.6 kg (17 lb). The maximum weight of the species is over 50 kg (110 lb). In exceptional cases, the species has been reported to attain 75 to 90 kg (165 to 198 lb), though most such reports are unverified and may be unreliable. They are the world's second-heaviest lizard, after the Komodo dragon. Their bodies are muscular, with long, powerful, laterally compressed tails.
The generic name Varanus is derived from the Arabic waral (ورل), which translates as "monitor". The specific name is the Latin word for "saviour", denoting a possible religious connotation. The water monitor is occasionally confused with the crocodile monitor (V. salvadorii) because of their similar scientific names.
In Thailand, the local word for a water monitor, hia (เหี้ย), is used as an insulting word for bad and evil things, including bad persons. The word is also thought to bring bad luck, so some people prefer to call the animals 'silver-and-gold' (ตัวเงินตัวทอง) to avoid the jinx.
The origin of this offensive meaning can be traced back to a time when more people lived in rural areas in close proximity to monitor lizards. Traditionally, Thai villagers lived in two-story houses; the top floor was for living, while the ground floor was designed to be a space for domestic animals such as pigs, chickens, and dogs. Water monitors would enter the ground floor and eat or maim the domestic animals, also hence the other name dtua gin gai (ตัวกินไก่ ‘chicken eater’).
In Indonesian and Malay, the water monitor is called biawak air, to differentiate it from the biawak pasir ("sand lizard"), Leiolepis belliana.
Water monitors defend themselves using their tails, claws, and jaws. They are excellent swimmers, using the raised fin on their tails to steer through water. They are carnivores, and consume a wide range of prey. They are known to eat fish, frogs, rodents, birds, crabs, and snakes. They have also been known to eat turtles, as well as young crocodiles and crocodile eggs. Water monitors have been observed eating catfish in a fashion similar to a mammalian carnivore, tearing off chunks of meat with their sharp teeth while holding it with their front legs and then separating different parts of the fish for sequential consumption.
Like the Komodo dragon, the water monitor will often eat carrion. They have a keen sense of smell and can smell a carcass from far away. They are known to feed on dead human bodies. While on the one hand their presence can be helpful in locating a missing person in forensic investigations, on the other hand they can inflict further injuries to the corpse, complicating ascertainment of the cause of death.
The first description of the water monitor and its behavior in English literature was made in 1681 by Robert Knox, who had had carefully observed the lizard during his long confinement in the Kingdom of Kandy: “There is a Creature here called Kobberaguion, resembling an Alligator. The biggest may be five or six feet long, speckled black and white. He lives most upon the Land, but will take the water and dive under it: hath a long blue forked tongue like a sting, which he puts forth and hisseth and gapeth, but doth not bite nor sting, tho the appearance of him would scare those that knew not what he was. He is not afraid of people, but will lie gaping and hissing at them in the way, and will scarce stir out of it. He will come and eat Carrion with the Dogs and Jackals, and will not be scared away by them, but if they come near to bark or snap at him, with his tail, which is long like a whip, he will so slash them, that they will run away and howl.”
Water monitors should be handled with care since they have many sharp teeth and can give gashing bites that can sever tendons and veins, causing extensive bleeding. The bite of a large pet water monitor was described by its American owner as being worse than that of a rattlesnake.
The possibility of venom in the genus Varanus is widely debated. Previously, venom was thought to be unique to Serpentes (snakes) and Heloderma (venomous lizards). The aftereffects of a Varanus bite were thought to be due to oral bacteria alone, but recent studies have shown venom glands are likely to be present in the mouths of several, if not all, of the species. The venom may be used as a defensive mechanism to fend off predators, to help digest food, to sustain oral hygiene, and possibly to help in capturing and killing prey. Varanus salvator has not yet been specifically tested, but its bites are likely to be consistent with the venomous bites from other varanid lizards.
Monitor lizards are traded globally and are the most common type of lizard to be exported from Southeast Asia, with 8.1 million exported between 1998 and 2007. Water monitors are used by humans for a variety of purposes and are one of the most exploited varanids. They are hunted predominantly for their skins for use in fashion accessories such as shoes, belts and handbags which are shipped globally, with as many as 1.5 million skins traded annually. Other uses include as a perceived remedy for common skin ailments and eczema, a perceived aphrodisiaca, novelty food in Indonesia and as pets.
In Nepal's Chitwan National Park it is a protected species under the Wild Animals Protection Act of 2002. In Hong Kong, it is a protected species under Wild Animals Protection Ordinance Cap 170. In Malaysia, this species is one of the most common wild animals, with numbers comparable to the population of macaques there. Although many fall victim to humans via roadkill and animal cruelty, they still thrive in most states of Malaysia, especially in the shrubs of the east coast states such as Pahang and Terengganu. In Thailand, all monitor lizards are protected species. They are still very common in large urban areas in Thailand and are frequently seen in Bangkok canals and parks.
Loss of habitat and hunting has exterminated water monitors from most of mainland India. In other areas they survive despite being hunted, due in part to the fact that larger ones, including large females that breed large numbers of eggs, have tough skins that are not desirable.
In Sri Lanka, they are protected by locals who value their predation of "crabs that would otherwise undermine the banks of rice fields". They are also protected due to eating venomous snakes.
The Grey Heron & the Water Monitor
The grey heron (Ardea cinerea) is a long-legged predatory wading bird of the heron family, Ardeidae, native throughout temperate Europe and Asia and also parts of Africa. It is resident in much of its range, but some populations from the more northern parts migrate southwards in autumn. A bird of wetland areas, it can be seen around lakes, rivers, ponds, marshes and on the sea coast. It feeds mostly on aquatic creatures which it catches after standing stationary beside or in the water or stalking its prey through the shallows.
Standing up to a metre tall, adults weigh from 1 to 2 kg (2.2 to 4.4 lb). They have a white head and neck with a broad black stripe that extends from the eye to the black crest. The body and wings are grey above and the underparts are greyish-white, with some black on the flanks. The long, sharply pointed beak is pinkish-yellow and the legs are brown.
The birds breed colonially in spring in "heronries", usually building their nests high in trees. A clutch of usually three to five bluish-green eggs is laid. Both birds incubate the eggs for a period of about 25 days, and then both feed the chicks, which fledge when seven or eight weeks old. Many juveniles do not survive their first winter, but if they do, they can expect to live for about five years.
In Ancient Egypt, the deity Bennu was depicted as a heron in New Kingdom artwork. In Ancient Rome, the heron was a bird of divination. Roast heron was once a specially-prized dish; when George Neville became Archbishop of York in 1465, four hundred herons were served to the guests.
The grey heron is a large bird, standing up to 100 cm (39 in) tall and measuring 84–102 cm (33–40 in) long with a 155–195 cm (61–77 in) wingspan. The body weight can range from 1.02–2.08 kg (2.2–4.6 lb). The plumage is largely ashy-grey above, and greyish-white below with some black on the flanks. Adults have the head and neck white with a broad black supercilium that terminates in the slender, dangling crest, and bluish-black streaks on the front of the neck. The scapular feathers are elongated and the feathers at the base of the neck are also somewhat elongated. Immature birds lack the dark stripe on the head and are generally duller in appearance than adults, with a grey head and neck, and a small, dark grey crest. The pinkish-yellow beak is long, straight and powerful, and is brighter in colour in breeding adults. The iris is yellow and the legs are brown and very long.
The main call is a loud croaking "fraaank", but a variety of guttural and raucous noises are heard at the breeding colony. The male uses an advertisement call to encourage a female to join him at the nest, and both sexes use various greeting calls after a pair bond has been established. A loud, harsh "schaah" is used by the male in driving other birds from the vicinity of the nest and a soft "gogogo" expresses anxiety, as when a predator is nearby or a human walks past the colony. The chicks utter loud chattering or ticking noises.
The Water Monitor
Varanus salvator, commonly known as the water monitor, is a large lizard native to South and Southeast Asia. Water monitors are one of the most common monitor lizards found throughout Asia. They range from Sri Lanka and coastal northeast India to Indochina, the Malay Peninsula, and various islands of Indonesia, living in areas close to water.
The species is known as Malayan water monitor, Asian water monitor, common water monitor, two-banded monitor, and as rice lizard, ring lizard, plain lizard and no-mark lizard, as well as simply "water monitor".
The water monitor is a large species of monitor lizard. Breeding maturity is attained for males when they are a relatively modest 40 cm (16 in) long and weigh 1 kg (2.2 lb), and for females at 50 cm (20 in). However, they grow much larger throughout life, with males being larger than females. Adults rarely exceed 1.5–2 m (4.9–6.6 ft) in length, but the largest specimen on record, from Sri Lanka, measured 3.21 m (10.5 ft). A common mature weight of V. salvator can be 19.5 kg (43 lb). However, 80 males killed for the leather trade in Sumatra averaged only 3.42 kg (7.5 lb) and 56.6 cm (22.3 in) snout-to-vent and 142 cm (56 in) in total length; 42 females averaged only 3.52 kg (7.8 lb) and 59 cm (23 in) snout-to-vent and 149.6 cm (58.9 in) in total length, although unskinned outsized specimens weighed 16 to 20 kg (35 to 44 lb). Another study from the same area by the same authors similarly estimated mean body mass for mature specimens at 20 kg (44 lb) while yet another study found a series of adults to weigh 7.6 kg (17 lb). The maximum weight of the species is over 50 kg (110 lb). In exceptional cases, the species has been reported to attain 75 to 90 kg (165 to 198 lb), though most such reports are unverified and may be unreliable. They are the world's second-heaviest lizard, after the Komodo dragon. Their bodies are muscular, with long, powerful, laterally compressed tails.
The generic name Varanus is derived from the Arabic waral (ورل), which translates as "monitor". The specific name is the Latin word for "saviour", denoting a possible religious connotation. The water monitor is occasionally confused with the crocodile monitor (V. salvadorii) because of their similar scientific names.
In Thailand, the local word for a water monitor, hia (เหี้ย), is used as an insulting word for bad and evil things, including bad persons. The word is also thought to bring bad luck, so some people prefer to call the animals 'silver-and-gold' (ตัวเงินตัวทอง) to avoid the jinx.
The origin of this offensive meaning can be traced back to a time when more people lived in rural areas in close proximity to monitor lizards. Traditionally, Thai villagers lived in two-story houses; the top floor was for living, while the ground floor was designed to be a space for domestic animals such as pigs, chickens, and dogs. Water monitors would enter the ground floor and eat or maim the domestic animals, also hence the other name dtua gin gai (ตัวกินไก่ ‘chicken eater’).
In Indonesian and Malay, the water monitor is called biawak air, to differentiate it from the biawak pasir ("sand lizard"), Leiolepis belliana.
Water monitors defend themselves using their tails, claws, and jaws. They are excellent swimmers, using the raised fin on their tails to steer through water. They are carnivores, and consume a wide range of prey. They are known to eat fish, frogs, rodents, birds, crabs, and snakes. They have also been known to eat turtles, as well as young crocodiles and crocodile eggs. Water monitors have been observed eating catfish in a fashion similar to a mammalian carnivore, tearing off chunks of meat with their sharp teeth while holding it with their front legs and then separating different parts of the fish for sequential consumption.
Like the Komodo dragon, the water monitor will often eat carrion. They have a keen sense of smell and can smell a carcass from far away. They are known to feed on dead human bodies. While on the one hand their presence can be helpful in locating a missing person in forensic investigations, on the other hand they can inflict further injuries to the corpse, complicating ascertainment of the cause of death.
The first description of the water monitor and its behavior in English literature was made in 1681 by Robert Knox, who had had carefully observed the lizard during his long confinement in the Kingdom of Kandy: “There is a Creature here called Kobberaguion, resembling an Alligator. The biggest may be five or six feet long, speckled black and white. He lives most upon the Land, but will take the water and dive under it: hath a long blue forked tongue like a sting, which he puts forth and hisseth and gapeth, but doth not bite nor sting, tho the appearance of him would scare those that knew not what he was. He is not afraid of people, but will lie gaping and hissing at them in the way, and will scarce stir out of it. He will come and eat Carrion with the Dogs and Jackals, and will not be scared away by them, but if they come near to bark or snap at him, with his tail, which is long like a whip, he will so slash them, that they will run away and howl.”
Water monitors should be handled with care since they have many sharp teeth and can give gashing bites that can sever tendons and veins, causing extensive bleeding. The bite of a large pet water monitor was described by its American owner as being worse than that of a rattlesnake.
The possibility of venom in the genus Varanus is widely debated. Previously, venom was thought to be unique to Serpentes (snakes) and Heloderma (venomous lizards). The aftereffects of a Varanus bite were thought to be due to oral bacteria alone, but recent studies have shown venom glands are likely to be present in the mouths of several, if not all, of the species. The venom may be used as a defensive mechanism to fend off predators, to help digest food, to sustain oral hygiene, and possibly to help in capturing and killing prey. Varanus salvator has not yet been specifically tested, but its bites are likely to be consistent with the venomous bites from other varanid lizards.
Monitor lizards are traded globally and are the most common type of lizard to be exported from Southeast Asia, with 8.1 million exported between 1998 and 2007. Water monitors are used by humans for a variety of purposes and are one of the most exploited varanids. They are hunted predominantly for their skins for use in fashion accessories such as shoes, belts and handbags which are shipped globally, with as many as 1.5 million skins traded annually. Other uses include as a perceived remedy for common skin ailments and eczema, a perceived aphrodisiaca, novelty food in Indonesia and as pets.
In Nepal's Chitwan National Park it is a protected species under the Wild Animals Protection Act of 2002. In Hong Kong, it is a protected species under Wild Animals Protection Ordinance Cap 170. In Malaysia, this species is one of the most common wild animals, with numbers comparable to the population of macaques there. Although many fall victim to humans via roadkill and animal cruelty, they still thrive in most states of Malaysia, especially in the shrubs of the east coast states such as Pahang and Terengganu. In Thailand, all monitor lizards are protected species. They are still very common in large urban areas in Thailand and are frequently seen in Bangkok canals and parks.
Loss of habitat and hunting has exterminated water monitors from most of mainland India. In other areas they survive despite being hunted, due in part to the fact that larger ones, including large females that breed large numbers of eggs, have tough skins that are not desirable.
In Sri Lanka, they are protected by locals who value their predation of "crabs that would otherwise undermine the banks of rice fields". They are also protected due to eating venomous snakes.
Varanus salvator, commonly known as the water monitor, is a large lizard native to South and Southeast Asia. Water monitors are one of the most common monitor lizards found throughout Asia. They range from Sri Lanka and coastal northeast India to Indochina, the Malay Peninsula, and various islands of Indonesia, living in areas close to water.
The species is known as Malayan water monitor, Asian water monitor, common water monitor, two-banded monitor, and as rice lizard, ring lizard, plain lizard and no-mark lizard, as well as simply "water monitor".
The water monitor is a large species of monitor lizard. Breeding maturity is attained for males when they are a relatively modest 40 cm (16 in) long and weigh 1 kg (2.2 lb), and for females at 50 cm (20 in). However, they grow much larger throughout life, with males being larger than females. Adults rarely exceed 1.5–2 m (4.9–6.6 ft) in length, but the largest specimen on record, from Sri Lanka, measured 3.21 m (10.5 ft). A common mature weight of V. salvator can be 19.5 kg (43 lb). However, 80 males killed for the leather trade in Sumatra averaged only 3.42 kg (7.5 lb) and 56.6 cm (22.3 in) snout-to-vent and 142 cm (56 in) in total length; 42 females averaged only 3.52 kg (7.8 lb) and 59 cm (23 in) snout-to-vent and 149.6 cm (58.9 in) in total length, although unskinned outsized specimens weighed 16 to 20 kg (35 to 44 lb). Another study from the same area by the same authors similarly estimated mean body mass for mature specimens at 20 kg (44 lb) while yet another study found a series of adults to weigh 7.6 kg (17 lb). The maximum weight of the species is over 50 kg (110 lb). In exceptional cases, the species has been reported to attain 75 to 90 kg (165 to 198 lb), though most such reports are unverified and may be unreliable. They are the world's second-heaviest lizard, after the Komodo dragon. Their bodies are muscular, with long, powerful, laterally compressed tails.
The generic name Varanus is derived from the Arabic waral (ورل), which translates as "monitor". The specific name is the Latin word for "saviour", denoting a possible religious connotation. The water monitor is occasionally confused with the crocodile monitor (V. salvadorii) because of their similar scientific names.
In Thailand, the local word for a water monitor, hia (เหี้ย), is used as an insulting word for bad and evil things, including bad persons. The word is also thought to bring bad luck, so some people prefer to call the animals 'silver-and-gold' (ตัวเงินตัวทอง) to avoid the jinx.
The origin of this offensive meaning can be traced back to a time when more people lived in rural areas in close proximity to monitor lizards. Traditionally, Thai villagers lived in two-story houses; the top floor was for living, while the ground floor was designed to be a space for domestic animals such as pigs, chickens, and dogs. Water monitors would enter the ground floor and eat or maim the domestic animals, also hence the other name dtua gin gai (ตัวกินไก่ ‘chicken eater’).
In Indonesian and Malay, the water monitor is called biawak air, to differentiate it from the biawak pasir ("sand lizard"), Leiolepis belliana.
Water monitors defend themselves using their tails, claws, and jaws. They are excellent swimmers, using the raised fin on their tails to steer through water. They are carnivores, and consume a wide range of prey. They are known to eat fish, frogs, rodents, birds, crabs, and snakes. They have also been known to eat turtles, as well as young crocodiles and crocodile eggs. Water monitors have been observed eating catfish in a fashion similar to a mammalian carnivore, tearing off chunks of meat with their sharp teeth while holding it with their front legs and then separating different parts of the fish for sequential consumption.
Like the Komodo dragon, the water monitor will often eat carrion. They have a keen sense of smell and can smell a carcass from far away. They are known to feed on dead human bodies. While on the one hand their presence can be helpful in locating a missing person in forensic investigations, on the other hand they can inflict further injuries to the corpse, complicating ascertainment of the cause of death.
The first description of the water monitor and its behavior in English literature was made in 1681 by Robert Knox, who had had carefully observed the lizard during his long confinement in the Kingdom of Kandy: “There is a Creature here called Kobberaguion, resembling an Alligator. The biggest may be five or six feet long, speckled black and white. He lives most upon the Land, but will take the water and dive under it: hath a long blue forked tongue like a sting, which he puts forth and hisseth and gapeth, but doth not bite nor sting, tho the appearance of him would scare those that knew not what he was. He is not afraid of people, but will lie gaping and hissing at them in the way, and will scarce stir out of it. He will come and eat Carrion with the Dogs and Jackals, and will not be scared away by them, but if they come near to bark or snap at him, with his tail, which is long like a whip, he will so slash them, that they will run away and howl.”
Water monitors should be handled with care since they have many sharp teeth and can give gashing bites that can sever tendons and veins, causing extensive bleeding. The bite of a large pet water monitor was described by its American owner as being worse than that of a rattlesnake.
The possibility of venom in the genus Varanus is widely debated. Previously, venom was thought to be unique to Serpentes (snakes) and Heloderma (venomous lizards). The aftereffects of a Varanus bite were thought to be due to oral bacteria alone, but recent studies have shown venom glands are likely to be present in the mouths of several, if not all, of the species. The venom may be used as a defensive mechanism to fend off predators, to help digest food, to sustain oral hygiene, and possibly to help in capturing and killing prey. Varanus salvator has not yet been specifically tested, but its bites are likely to be consistent with the venomous bites from other varanid lizards.
Monitor lizards are traded globally and are the most common type of lizard to be exported from Southeast Asia, with 8.1 million exported between 1998 and 2007. Water monitors are used by humans for a variety of purposes and are one of the most exploited varanids. They are hunted predominantly for their skins for use in fashion accessories such as shoes, belts and handbags which are shipped globally, with as many as 1.5 million skins traded annually. Other uses include as a perceived remedy for common skin ailments and eczema, a perceived aphrodisiaca, novelty food in Indonesia and as pets.
In Nepal's Chitwan National Park it is a protected species under the Wild Animals Protection Act of 2002. In Hong Kong, it is a protected species under Wild Animals Protection Ordinance Cap 170. In Malaysia, this species is one of the most common wild animals, with numbers comparable to the population of macaques there. Although many fall victim to humans via roadkill and animal cruelty, they still thrive in most states of Malaysia, especially in the shrubs of the east coast states such as Pahang and Terengganu. In Thailand, all monitor lizards are protected species. They are still very common in large urban areas in Thailand and are frequently seen in Bangkok canals and parks.
Loss of habitat and hunting has exterminated water monitors from most of mainland India. In other areas they survive despite being hunted, due in part to the fact that larger ones, including large females that breed large numbers of eggs, have tough skins that are not desirable.
In Sri Lanka, they are protected by locals who value their predation of "crabs that would otherwise undermine the banks of rice fields". They are also protected due to eating venomous snakes.