White-fronted goose
| Greater white-fronted goose | |
|---|---|
 |
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| Pacific white-fronted goose (Anser albifrons frontalis) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Superorder: | Galloanserae |
| Order: | Anseriformes |
| Family: | Anatidae |
| Subfamily: | Anserinae |
| Tribe: | Anserini |
| Genus: | Anser |
| Species: | A. albifrons |
| Binomial name | |
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Anser albifrons (Scopoli, 1769) |
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| Subspecies | |
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| Synonyms | |
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Branta albifrons (Scopoli, 1769) |
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Branta albifrons (Scopoli, 1769)
The greater white-fronted goose (Anser albifrons) is a species of goose. The greater white-fronted goose is closely related to the smaller lesser white-fronted goose (A. erythropus). In Europe it has been known as simply "white-fronted goose"; in North America it is known as the greater white-fronted goose (or "greater whitefront"), and this name is also increasingly adopted internationally. It is named for the patch of white feathers bordering the base of its bill. But even more distinctive are the salt-and-pepper markings on the breast of adult birds, which is why the goose is colloquially called the "specklebelly" in North America.Anser is the Latin for "goose", and albifrons comes from the Latin albus "white " and frons " forehead ".
Greater white-fronted geese are 64–81 cm (25–32 in) in length, have a 130–165 cm (51–65 in) wingspan and weigh 1.93–3.31 kg (4.3–7.3 lb). They have bright orange legs and mouse-coloured upper wing-coverts. They are smaller than greylag geese. As well as being larger than the lesser white-fronted goose, the greater white-fronted goose lacks the yellow eye-ring of that species, and the white facial blaze does not extend upwards so far as in lesser.
The male is typical larger in size, both sexes are similar in appearance—greyish brown birds with light grey breasts dappled with dark brown to black blotches and bars. Both males and females also have a pinkish bill and orange legs and feet.
The appearance of European or Russian white-fronted geese, of the race albifrons and Greenland white-fronted geese, of the race flavirostris, differ in a number of ways. The Greenland white-fronted goose, in all plumages, looks darker and more 'oily-looking' than the European white-fronted goose, both at rest and in flight.
The following are the differences which apply to first-winter plumage:
The belly-barring on adult birds is on average more extensive on flavirostris than on albifrons, but the individual variation in both forms renders this of limited use as an identification feature.
The bill of adult Greenland white-fronts are also orange-yellow at the base, but can be more pinkish-yellow on the outer-half, thus close in colour to European white-fronts; the colour difference is more easily determined in dull, flat light rather than bright sunshine.
The greater white-fronted goose is divided into five subspecies. The nominate subspecies A. a. albifrons breeds in the far north of Europe and Asia, and winters further south and west in Europe.
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Wikipedia