View allAll Photos Tagged Aggregation
A huge aggregation of swallows. Hard to estimate numbers, but more than 5000 were probably present. Birds kept swirling around, and moving east along the lake front.
Ponchartrain Lakefront, Mandeville, LA
28 November, 2013
Scientific Name : Theropithecus gelada
Baboons are terrestrial monkeys and among the most entertaining of African animals to watch, perhaps because they exhibit many behaviours rather similar to our own. Troops typically number between 20 and 80 individuals, although bigger aggregation of over 100 members are known. A troop consist of several kinship groups of adult females and their offspring, as well as a number of mature, sexually-active males. There is a strict hierarchy among the females and the males, with individual males generally having exclusive mating rights to certain kinship groups. Immature males are tolerated within the troop until they reach five years of age, after which they attempt to join neighbouring troops. Individual male baboons are formidable animals armed with large canine teeth, and fear only lions and large male leopards. When two or more male baboons are together, even these predators usually give them a wide berth. This partial immunity from predation has allowed baboons to develop a terrestrial lifestyle, although constant vigilance is required to keep the young out of danger. Baboons frequently forage alongside antelope as the acute hearing of these herbivores provides an early warning against predators. At night, baboons gather to roost in large trees along watercourses or on steep rock faces. Like other primates, baboons are omnivorous. The troop forages in a loose group, digging up succulent roots, turning over rocks in search of insects and scorpions, gorging themselves on fruit and berries, or wading into shallow pools for water lily tubers. The newborn fawns of gazelle and antelope may be preyed upon by adult male baboons. Baboons can become a pest in agricultural areas as they raid orchards and feed on crops, so they are often heavily persecuted by farmers. They can even become a menace around safari lodges, where baboon chasers are sometimes employed to discourage them. The number of baboon species is disputed, with some authors lumping the Guinea, chacma, olive and yellow baboons as a single species - the savanna baboon.
Scientific Name : Theropithecus gelada
Baboons are terrestrial monkeys and among the most entertaining of African animals to watch, perhaps because they exhibit many behaviours rather similar to our own. Troops typically number between 20 and 80 individuals, although bigger aggregation of over 100 members are known. A troop consist of several kinship groups of adult females and their offspring, as well as a number of mature, sexually-active males. There is a strict hierarchy among the females and the males, with individual males generally having exclusive mating rights to certain kinship groups. Immature males are tolerated within the troop until they reach five years of age, after which they attempt to join neighbouring troops. Individual male baboons are formidable animals armed with large canine teeth, and fear only lions and large male leopards. When two or more male baboons are together, even these predators usually give them a wide berth. This partial immunity from predation has allowed baboons to develop a terrestrial lifestyle, although constant vigilance is required to keep the young out of danger. Baboons frequently forage alongside antelope as the acute hearing of these herbivores provides an early warning against predators. At night, baboons gather to roost in large trees along watercourses or on steep rock faces. Like other primates, baboons are omnivorous. The troop forages in a loose group, digging up succulent roots, turning over rocks in search of insects and scorpions, gorging themselves on fruit and berries, or wading into shallow pools for water lily tubers. The newborn fawns of gazelle and antelope may be preyed upon by adult male baboons. Baboons can become a pest in agricultural areas as they raid orchards and feed on crops, so they are often heavily persecuted by farmers. They can even become a menace around safari lodges, where baboon chasers are sometimes employed to discourage them. The number of baboon species is disputed, with some authors lumping the Guinea, chacma, olive and yellow baboons as a single species .
Bronx Zoo Baboon Reserve
Marine life swimming around a fish aggregation device, or FAD, belonging to the Ecuadorean purse seiner 'Ingalapagos', which was spotted by Greenpeace in the vicinity of the northern Galapagos Islands at LAT 04:07 NORTH / LONG 091:28 WEST. Greenpeace is calling for a total ban on the use of FADs, and the establishment of a global network of marine reserves.
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Dendron drawing software (2001), exploring gestural augmentation through diffusion-limited aggregation.
The idea of ladybirds overwintering in aggregations was well know to me from reading and photographs I had seen. Up to now, I had never been lucky enough to come across more than a few together, and I could never really be sure this was what they were. Not so on this occasion, as you can see from this sequence of photos. The tremendous variation in body pattern leads me to think that these are harlequin ladybirds, of described as the fastest-speeding invasive insect in Europe. It is said to have arrived in England in 2003, following escapes from those used in pest-control.
These are inside a bird hide, and there were half a dozen 'clumps' of them. Quite a sight.
Near Masham, North Yorkshire, March 22nd 2018.
Aggregation of Copper grains
Courtesy of Mr. Reza Abbaspour , Georgia Institute of Technology
Image Details
Instrument used: Other FEI FIB (V600, Vectra, etc.)
Representatives of cultural heritage institutions,
policymakers and the Europeana Network
gathered in Iaşi to design interventions to improve national infrastructures. They exchanged insights,
challenges and opportunities. Collaboratively they
Came up with a set of recommendations to support national strategies, develop strong local communities and implement shared frameworks. Europeana’s Common Culture project will oversee the implementation of these recommendations. Photo by Sebastiaan ter Burg, CC BY 4.0
Removing aggregation criteria for IPv6 initial allocations
Tomohiro Fujisaki
Keio University / NTT
Policy SIG, 4 Mar. 2010, Kuala Lumpur
IPv6
The Phoenix aggregation were hockey professionals who dominated the Boundary Hockey League in the 1910-11 season. They won the BHL championship cup, the Giant Powder Shield, left, emblematic of hockey supremacy in all British Columbia, and the International Cup as the kings of hockey in BC and Washington state combined.
The players of the 1910-11 Phoenix phenoms, with their playing positions:
H Neil, point
B Laing, goal
A Ellis, cover
P C McWha, cover
S Sanders, rover
R Lynne, centre
W Thrasher, right wing
J Ouellet, left wing
A McQueen, spare
I McKelvery, spare
Purple Sunbird (Eclipse Plumage/ Non-breeding Plumage) - A hop up to a higher branch.
The purple sunbird (Cinnyris asiaticus) is a small sunbird. Like other sunbirds they feed mainly on nectar, although they will also take insects, especially when feeding young. They have a fast and direct flight and can take nectar by hovering like a hummingbird but often perch at the base of flowers. The males appear all black except in some lighting when the purple iridescence becomes visible. Females are olive above and yellowish below.
This small sunbird has a relatively short bill, a dark and short square ended tail with distinctive sexual dimorphism. Less than 10 cm long they have a down-curve bill with brush-tipped tubular tongues that aid in nectar feeding. The male is glossy metallic bluish to purplish black on the upper parts with the wings appearing dark brown. The breeding male has the underparts also of the same purplish black, but non-breeding males may show a central streak of black on yellow underparts. (Birds in this eclipse plumage were once designated as a species, C. currucaria.) In the breeding plumage, the male can be confused with the syntopic Loten's sunbird which has a long bill and distinctive broad maroon band on the breast. Breeding males will sometimes show their yellow pectoral tufts in displays. There is a patch of bright blue on the shoulder of breeding males. The maroon shine on the feathers of the collar around the neck is visible mainly during the breeding seasons.
Females are olive brown above with yellowish underside. There is a pale supercilium beyond the eye. There is a darkish eye stripe. The throat and breast are yellow becoming pale towards the vent. The outer tail feathers are tipped in white both in the male and female.
They are seen in pairs or small groups and aggregations may be found in gardens with suitable flowers. They feed mainly on nectar but also take fruits and insects. Groups of as many as 40 to 50 individuals have sometimes been noted.
The species is distributed widely from West Asia through the Indian subcontinent and into Southeast Asia. They are resident birds in most parts of their range and do not move large distances. They are found in thin forest and garden land, including those in dense urban areas. Local movements are however noted especially in the drier parts of northwestern India and Pakistan where they are said to arrive in large numbers before summer.
The nominate subspecies is distributed in India east of the desert region and south of the Himalayas extending to the west and south of India and Sri Lanka. They are found mainly on the plains but going up to 2400 m in southern India and up to 1700 m in the Himalayas. The race brevirostris is found in the dry zone from the Arabian Peninsula into Iran, Afghanistan, Pakistan until the dry zone of Rajasthan and Gujarat. These may however winter south near Goa. This form has a slight tinge of green in the pectoral yellow tufts. The race intermedius extends from the border of Orissa and Andhra Pradesh northwards into Bangladesh, Myanmar and Indochina.
These movements of these birds are not well understood. A male ringed in Bharatpur was recovered in Dehra Dun, 350 km north.
These birds are very vociferous and will call and will join to mob owls or other predators. The song is rapid rattle followed by ringing, metallic notes. Other call notes include a "chwit" or "chwing!" notes. The primary breeding season is before the Monsoons, April to June in northern India and January to June in Sri Lanka. While feeding they flick their wings. They rarely hover at flowers and usually perch to forage for nectar.
In courtship displays the male raises its head, fans its tail and flutters with partly open wings that expose the pectoral tufts and sings before the female. The nest is a pouch made of cobwebs, thin strips of vegetation, lichens and bark. The entrance hole on the side is often shaded by an overhanging projection. The nest is built almost entirely by the female. The nest material is not woven and most of it is held together by cobwebs. About five to ten days may be taken in the building of the nest. The inner cavity is expanded by the bird by openings its wing and turning around on the inside. In Sri Lanka and in southern India, it sometimes builds its nest by modifying and lining the cobweb structures formed by colonial or 'social' spiders, Stegodyphus sarasinorum (Eresidae). Two eggs are usually laid. The nest is usually suspended from a low branch, often of thorny plants but are sometimes build close to human habitations, attached to wires or other man-made objects and even indoors in an unused toilet. Only the female incubates the eggs which hatch after 15 to 17 days. Males assist in feeding the chicks although females involve themselves to a greater extent, making more trips as the chicks get older.
Sunbirds have been known to live for nearly 22 years in captivity.
Representatives of cultural heritage institutions,
policymakers and the Europeana Network
gathered in Iaşi to design interventions to improve national infrastructures. They exchanged insights,
challenges and opportunities. Collaboratively they
Came up with a set of recommendations to support national strategies, develop strong local communities and implement shared frameworks. Europeana’s Common Culture project will oversee the implementation of these recommendations. Photo by Sebastiaan ter Burg, CC BY 4.0
Ito forwards his Communal Aggregation hypothesis as a competing idea to the fashionable kin-selection.
A whale shark botella. Whale shark (Rhincodon typus) at a feeding aggregation off of Isla Mujeres, Mexico
echeng110817_081113A
A Greenpeace activist holds a banner under a fish aggregation device (FAD) calling for "Marine Reserves Now". Around 10% of the catch generated by purse seine FAD fisheries is unwanted bycatch and includes endangered species of sharks and turtles. The catch of large amounts of juvenile bigeye and yellowfin tunas in these fisheries is now threatening the survival of these commercially valuable species. Greenpeace is calling for a total ban on the use of fish aggregation devices in purse seining and the establishment of a global network of marine reserves.