The tundra bean goose (''Anser serrirostris'') is a

goose A goose ( : geese) is a bird of any of several waterfowl species in the family Anatidae. This group comprises the genera ''Anser'' (the grey geese and white geese) and '' Branta'' (the black geese). Some other birds, mostly related to the ...

that breeds in northern

Siberia Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part of ...

. This and the

taiga bean goose The taiga bean goose (''Anser fabalis'') is a goose that breeds in northern Europe and Asia. This and the tundra bean goose are recognised as separate species by the American Ornithological Society and the International Ornithologists' Union, bu ...

are recognised as separate species by the

American Ornithological Society The American Ornithological Society (AOS) is an ornithological organization based in the United States. The society was formed in October 2016 by the merger of the American Ornithologists' Union (AOU) and the Cooper Ornithological Society. Its m ...

and

International Ornithologists' Union The International Ornithologists' Union, formerly known as the International Ornithological Committee, is a group of about 200 international ornithologists, and is responsible for the International Ornithological Congress and other international ...

, but are considered a single species by other authorities (collectively called bean goose). It is migratory and winters further south in Asia. The taiga and tundra bean goose diverged about 2.5 million years ago and established secondary contact ca. 60,000 years ago, resulting in extensive gene flow.

Description

The length ranges from , wingspan from and weight from . In the

nominate subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

, males average and females average . The bill is black at the base and tip, with an orange band across the middle; the legs and feet are also bright orange. The upper wing-coverts are dark brown, as in the

white-fronted goose The greater white-fronted goose (''Anser albifrons'') is a species of goose related to the smaller lesser white-fronted goose (''A. erythropus''). It is named for the patch of white feathers bordering the base of its bill, in fact ''albifrons ...

(''Anser albifrons'') and the

lesser white-fronted goose The lesser white-fronted goose (''Anser erythropus'') is a goose closely related to the larger white-fronted goose (''A. albifrons''). It breeds in the northernmost Palearctic, but it is a scarce breeder in Europe. There is a re-introduction sche ...

(''A. erythropus''), but differing from these in having narrow white fringes to the feathers. The voice is a loud honking, higher pitched in the smaller subspecies. The closely related

pink-footed goose The pink-footed goose (''Anser brachyrhynchus'') is a goose which breeds in eastern Greenland, Iceland and Svalbard. It is migratory, wintering in northwest Europe, especially Ireland, Great Britain, the Netherlands, and western Denmark. The nam ...

(''A. brachyrhynchus'') has the bill short, bright pink in the middle, and the feet also pink, the upper wing-coverts being nearly of the same bluish-grey as in the

greylag goose The greylag goose or graylag goose (''Anser anser'') is a species of large goose in the waterfowl family Anatidae and the type species of the genus ''Anser''. It has mottled and barred grey and white plumage and an orange beak and pink legs. A ...

Taxonomy

There are two subspecies: * ''A. s. rossicus''

Buturlin Buturlin, feminine: Buturlina (russian: Бутурли́н, Бутурлина) is a Russian surname of a Russian noble . Notable people with this surname include: * Alexander Buturlin (1694–1767), a Russian general * Anna Artemevna Buturlina ( ...

, 1933. Northern Russian tundra east to the Taimyr Peninsula. Small; bill short and stubby, with narrow orange band. ''Anser fabalis rossicus'' is one of the species to which the ''Agreement on the Conservation of African-Eurasian Migratory Waterbirds'' (

AEWA The Agreement on the Conservation of African-Eurasian Migratory Waterbirds, or African-Eurasian Waterbird Agreement (AEWA) is an independent international treaty developed under the auspices of the United Nations Environment Programme's Conventio ...

) applies. * ''A. s. serrirostris'' Gould, 1852. East Siberian tundra. Large; bill long and stout, with narrow orange band.

Distribution

The tundra bean goose has no regular wintering sites, but is found in small groups among other

grey goose The waterfowl genus ''Anser'' includes the grey geese and the white geese. It belongs to the true geese and swan subfamily (Anserinae). The genus has a Holarctic distribution, with at least one species breeding in any open, wet habitats in th ...

species – among the most regular localities are

WWT Slimbridge WWT Slimbridge is a wetland Nature reserve, wildlife reserve near Slimbridge in Gloucestershire, England. It is midway between Bristol and Gloucester on the eastern side of the estuary of the River Severn. The reserve, set up by the artist and ...

Gloucestershire Gloucestershire ( abbreviated Glos) is a county in South West England. The county comprises part of the Cotswold Hills, part of the flat fertile valley of the River Severn and the entire Forest of Dean. The county town is the city of Gl ...

and

Holkham Marshes Holkham National Nature Reserve is England's largest national nature reserve (NNR). It is on the Norfolk coast between Burnham Overy Staithe and Blakeney, and is managed by Natural England with the cooperation of the Holkham Estate. Its com ...

, Norfolk.

References

{{Taxonbar, from1=Q673280, from2=Q25519514

tundra bean goose The tundra bean goose (''Anser serrirostris'') is a goose that breeds in northern Siberia. This and the taiga bean goose are recognised as separate species by the American Ornithological Society and International Ornithologists' Union, but are c ...

Birds of Scandinavia Birds of Russia Natural monuments of Japan