Brent Geese & Whooper Swan
East Coast Nature Reserve (ECNR)
Newcastle Co.Wicklow
Ireland 19-03-2021
Brent Goose (Light-bellied) (Branta bernicla hrota)
[order] ANSERIFORMES | [family] Anatidae | [latin] Branta bernicla | [UK] Brant Goose | [FR] Bernache cravant | [DE] Ringelgans | [ES] Barnacla de Cara Negra | [NL] Rotgans |
Measurements
spanwidth min.: 105 cm
spanwidth max.: 117 cm
size min.: 55 cm
size max.: 62 cm
Breeding
incubation min.: 24 days
incubation max.: 26 days
fledging min.: 36 days
fledging max.: 26 days
broods 1
eggs min.: 6
eggs max.: 10
Light-bellied Brent Goose
Branta bernicla hrota
Cadhan
This population winters almost entirely in Ireland, with small numbers in parts of Britain and France.
Status: Winter migrant from high-Arctic Canada. Most occur in Ireland between October and April.
Conservation Concern: Amber-listed as the majority winter at less than ten sites. The Irish population is also internationally significant, another amber listing criterion. The European population has been evaluated as Vulnerable as several important populations declined.
Identification: Small dark goose, with a black head, neck and breast, and dark-brown upperparts and pale underparts. Almost whitish flanks, and small white crescent on the upperparts of the neck visible at close range.
Similar Species: Dark-bellied Brent Goose, Black Brant, Barnacle Goose
Call: Gutteral 'rhut, rhut'
Diet: During the winter, it feeds mostly on eel-grass, which grows on muddy estuaries, and also on grasslands, usually when coastal supplies have been depleted at estuarine sites.
Breeding: Nests in small, loose colonies by coastal tundra, with pools and small inlets.
Wintering: Mostly found on coastal estuaries during the autumn and early winter, and also on grasslands from mid-winter, until departure for the breeding grounds begins in late April.
Where to See: Highest numbers (c. 30,000) are seen at Strangford Lough in Northern Ireland in October, where most congregate on arrival. Thereafter, they move to other estuarine sites. Lough Foyle in County Derry, Dublin Bay in County Dublin, Tralee Bay, Lough Gill & Akeragh Lough in County Kerry, Rogerstown Estuary in County Dublin, Wexford Harbour & Slobs in County Wexford are other well-used sites (1,000-3,500 birds).
Physical characteristics
The Brant is similar in appearance to the Canada Goose, but smaller and darker. The adult has a gray belly and breast, white rump, and black neck and head with a thin white necklace and no chin-strap.
Fast fliers with swept-back wings, Brant are usually found in a flock. They forage while wading, dabbling in shallow water, or while walking on mudflats or the shore. They display strong site-fidelity to both their wintering and nesting areas.
Habitat
Brant are almost exclusively coastal in their range and are found in shallow bays and saltwater marshes. They nest in the wet, coastal tundra of the high Arctic. Their winter habitat is closely tied to the occurrence of sea grasses and marine algae.
Other details
Branta bernicla is a rare breeder in the European Arctic, but winters mainly in coastal areas of western Europe, which accounts for less than half of its global wintering range. Its European wintering population is large (>240,000 individuals), and increased between 1970-1990. Although a few populations increased or were broadly stable during 1990-2000, key wintering populations (of the subspecies B. b. bernicla) in the United Kingdom, France and the Netherlands declined, and the species underwent a large decline (>30%) overall.
This goose is breeding on the arctic coasts of Eurasia and North America, mainly on small islets protected from polar foxes (Alopex lagopus). It winters along the temperate Atlantic and Pacific coasts. The birds visiting the European Union belong to three different populations (Scott & Rose). The first population, estimated at 20000 individuals, comprises the white-bellied birds of the race hrota, breeding in Greenland and northern Canada and wintering in Ireland. The second population, estimated at 5000 individuals, comprises the birds of the race hrota breeding on Svalbard and wintering in Denmark and north-eastern England. The third population, estimated at 300000 individuals, comprises the dark-bellied birds of the nominate race, breeding along the Russian coasts and wintering in Denmark, Germany, the Netherlands, south-western England and France. All three populations have undergone important fluctuations. The nominate race has experienced a 90% decline during the 1930s following a disease of its foodplant, Zostera marina. It has started to recover since the 1950s, and the increase is still in progress. The populations of Canada and Greenland have increased since the 1960s and seem currently to be stable. The population of Svalbard dropped from about 40000-50000 to a mere 2000 at the end of the 1960s, not only because of the disease of Zostera but also because of non sustainable hunting. Since the 1970s it has recovered
Feeding
Historically, Brant fed almost exclusively on eelgrass, which is still strongly preferred when available. Now they also forage on grasslands and have been able to diversify their diet in the absence of eelgrass, although their range is still closely tied to eelgrass. Brant also eat some aquatic invertebrates.
Conservation
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence 30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern. [conservation status from birdlife.org]
Breeding
Long-term pair bonds usually form on the wintering grounds. Nesting occurs in loose colonies, on small islands in tundra ponds. The breeding range of the Brant is typically within five miles of the coast. The nest is a shallow bowl of grass and other vegetation, lined with down. The female incubates 3 to 5 eggs for 22 to 24 days. The young leave the nest within a day of hatching, and both parents continue to tend them and lead them to sources of food. During the long days of the high-Arctic summer, the young feed at all hours, and grow quickly. They fledge at 40 to 50 days, but stay with the parents through the first migration.
Migration
Single wholly migratory population. Depart Russian tundras mid-August to 1st week September. Main route west along arctic coasts to White Sea, then overland to Gulfs of Finland and Bothnia. Passage through Baltic mid-September to early October; first arrivals Denmark late September but bulk October. Some stay Denmark and western Germany through November before moving on in colder weather; others go straight to winter quarters in Netherlands, south-east England, and west France, where peak numbers December-February. Return passage begins early March; most leave England and France by mid-April. Spring gatherings in Netherlands, Denmark and western Germany until main departures in mid-May; only stragglers
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Whooper Swan (Cygnus cygnus)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Anseriformes
Family:Anatidae
Genus:Cygnus
Species:C. cygnus
Binomial name
Cygnus cygnus
Eala Ghlórach
Status: Winter visitor to wetlands throughout Ireland from October to April.
Conservation Concern: Amber-listed due to Ireland hosting more than 20% of the European wintering population. Also due to the majority of Whooper Swans wintering at ten or less sites, as well as its very small breeding population. BirdLife International has assessed the European population as Secure.
Identification: Similar to Bewick's Swan, but larger, with longer neck. Yellow and black bill, with the yellow projecting below the nostril.
Similar Species: Mute and Bewick's Swans.
Call: Vocal bugling or honking.
Diet: Aquatic vegetation, but they are increasingly being recorded grazing on grass in pasture and spilt grain, as well as potatoes from cultivated land.
Breeding: Open shallow water, by coastal inlets, estuaries and rivers. The population occurring in Ireland breeds in Iceland.
Wintering: Most on lowland open farmland around inland wetlands, regularly seen while feeding on grasslands and stubble.
Where to See: Relatively widespread, especially north and west of a line between Limerick and Dublin. Lough Swilly & River Foyle (Co. Donegal) and Lough Foyle on the Donegal/Derry boundary, Lough Gara (Co. Sligo) and the Lough Oughter wetland complex all support greatest numbers (400-2,000 birds).
Brent Geese & Whooper Swan
East Coast Nature Reserve (ECNR)
Newcastle Co.Wicklow
Ireland 19-03-2021
Brent Goose (Light-bellied) (Branta bernicla hrota)
[order] ANSERIFORMES | [family] Anatidae | [latin] Branta bernicla | [UK] Brant Goose | [FR] Bernache cravant | [DE] Ringelgans | [ES] Barnacla de Cara Negra | [NL] Rotgans |
Measurements
spanwidth min.: 105 cm
spanwidth max.: 117 cm
size min.: 55 cm
size max.: 62 cm
Breeding
incubation min.: 24 days
incubation max.: 26 days
fledging min.: 36 days
fledging max.: 26 days
broods 1
eggs min.: 6
eggs max.: 10
Light-bellied Brent Goose
Branta bernicla hrota
Cadhan
This population winters almost entirely in Ireland, with small numbers in parts of Britain and France.
Status: Winter migrant from high-Arctic Canada. Most occur in Ireland between October and April.
Conservation Concern: Amber-listed as the majority winter at less than ten sites. The Irish population is also internationally significant, another amber listing criterion. The European population has been evaluated as Vulnerable as several important populations declined.
Identification: Small dark goose, with a black head, neck and breast, and dark-brown upperparts and pale underparts. Almost whitish flanks, and small white crescent on the upperparts of the neck visible at close range.
Similar Species: Dark-bellied Brent Goose, Black Brant, Barnacle Goose
Call: Gutteral 'rhut, rhut'
Diet: During the winter, it feeds mostly on eel-grass, which grows on muddy estuaries, and also on grasslands, usually when coastal supplies have been depleted at estuarine sites.
Breeding: Nests in small, loose colonies by coastal tundra, with pools and small inlets.
Wintering: Mostly found on coastal estuaries during the autumn and early winter, and also on grasslands from mid-winter, until departure for the breeding grounds begins in late April.
Where to See: Highest numbers (c. 30,000) are seen at Strangford Lough in Northern Ireland in October, where most congregate on arrival. Thereafter, they move to other estuarine sites. Lough Foyle in County Derry, Dublin Bay in County Dublin, Tralee Bay, Lough Gill & Akeragh Lough in County Kerry, Rogerstown Estuary in County Dublin, Wexford Harbour & Slobs in County Wexford are other well-used sites (1,000-3,500 birds).
Physical characteristics
The Brant is similar in appearance to the Canada Goose, but smaller and darker. The adult has a gray belly and breast, white rump, and black neck and head with a thin white necklace and no chin-strap.
Fast fliers with swept-back wings, Brant are usually found in a flock. They forage while wading, dabbling in shallow water, or while walking on mudflats or the shore. They display strong site-fidelity to both their wintering and nesting areas.
Habitat
Brant are almost exclusively coastal in their range and are found in shallow bays and saltwater marshes. They nest in the wet, coastal tundra of the high Arctic. Their winter habitat is closely tied to the occurrence of sea grasses and marine algae.
Other details
Branta bernicla is a rare breeder in the European Arctic, but winters mainly in coastal areas of western Europe, which accounts for less than half of its global wintering range. Its European wintering population is large (>240,000 individuals), and increased between 1970-1990. Although a few populations increased or were broadly stable during 1990-2000, key wintering populations (of the subspecies B. b. bernicla) in the United Kingdom, France and the Netherlands declined, and the species underwent a large decline (>30%) overall.
This goose is breeding on the arctic coasts of Eurasia and North America, mainly on small islets protected from polar foxes (Alopex lagopus). It winters along the temperate Atlantic and Pacific coasts. The birds visiting the European Union belong to three different populations (Scott & Rose). The first population, estimated at 20000 individuals, comprises the white-bellied birds of the race hrota, breeding in Greenland and northern Canada and wintering in Ireland. The second population, estimated at 5000 individuals, comprises the birds of the race hrota breeding on Svalbard and wintering in Denmark and north-eastern England. The third population, estimated at 300000 individuals, comprises the dark-bellied birds of the nominate race, breeding along the Russian coasts and wintering in Denmark, Germany, the Netherlands, south-western England and France. All three populations have undergone important fluctuations. The nominate race has experienced a 90% decline during the 1930s following a disease of its foodplant, Zostera marina. It has started to recover since the 1950s, and the increase is still in progress. The populations of Canada and Greenland have increased since the 1960s and seem currently to be stable. The population of Svalbard dropped from about 40000-50000 to a mere 2000 at the end of the 1960s, not only because of the disease of Zostera but also because of non sustainable hunting. Since the 1970s it has recovered
Feeding
Historically, Brant fed almost exclusively on eelgrass, which is still strongly preferred when available. Now they also forage on grasslands and have been able to diversify their diet in the absence of eelgrass, although their range is still closely tied to eelgrass. Brant also eat some aquatic invertebrates.
Conservation
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence 30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern. [conservation status from birdlife.org]
Breeding
Long-term pair bonds usually form on the wintering grounds. Nesting occurs in loose colonies, on small islands in tundra ponds. The breeding range of the Brant is typically within five miles of the coast. The nest is a shallow bowl of grass and other vegetation, lined with down. The female incubates 3 to 5 eggs for 22 to 24 days. The young leave the nest within a day of hatching, and both parents continue to tend them and lead them to sources of food. During the long days of the high-Arctic summer, the young feed at all hours, and grow quickly. They fledge at 40 to 50 days, but stay with the parents through the first migration.
Migration
Single wholly migratory population. Depart Russian tundras mid-August to 1st week September. Main route west along arctic coasts to White Sea, then overland to Gulfs of Finland and Bothnia. Passage through Baltic mid-September to early October; first arrivals Denmark late September but bulk October. Some stay Denmark and western Germany through November before moving on in colder weather; others go straight to winter quarters in Netherlands, south-east England, and west France, where peak numbers December-February. Return passage begins early March; most leave England and France by mid-April. Spring gatherings in Netherlands, Denmark and western Germany until main departures in mid-May; only stragglers
-------------------------------------------
Whooper Swan (Cygnus cygnus)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Anseriformes
Family:Anatidae
Genus:Cygnus
Species:C. cygnus
Binomial name
Cygnus cygnus
Eala Ghlórach
Status: Winter visitor to wetlands throughout Ireland from October to April.
Conservation Concern: Amber-listed due to Ireland hosting more than 20% of the European wintering population. Also due to the majority of Whooper Swans wintering at ten or less sites, as well as its very small breeding population. BirdLife International has assessed the European population as Secure.
Identification: Similar to Bewick's Swan, but larger, with longer neck. Yellow and black bill, with the yellow projecting below the nostril.
Similar Species: Mute and Bewick's Swans.
Call: Vocal bugling or honking.
Diet: Aquatic vegetation, but they are increasingly being recorded grazing on grass in pasture and spilt grain, as well as potatoes from cultivated land.
Breeding: Open shallow water, by coastal inlets, estuaries and rivers. The population occurring in Ireland breeds in Iceland.
Wintering: Most on lowland open farmland around inland wetlands, regularly seen while feeding on grasslands and stubble.
Where to See: Relatively widespread, especially north and west of a line between Limerick and Dublin. Lough Swilly & River Foyle (Co. Donegal) and Lough Foyle on the Donegal/Derry boundary, Lough Gara (Co. Sligo) and the Lough Oughter wetland complex all support greatest numbers (400-2,000 birds).