Greater White-fronted Goose

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 lb 4 oz – 7 lb 5 oz). They have bright orange legs and mouse-coloured upper wing coverts. They are smaller than greylag geese. The greater white-fronted goose is larger than and lacks the yellow eye ring of the lesser white-fronted goose, and its white facial blaze does not extend upwards so far as in the lesser. The male is typically larger in size, but 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. Greater white-fronted geese make a variation of sounds, but notably the most recognizable is their high-pitched cackle that can be imitated by the sounds "he-he". A distinct breaking of the note occurs from the first cackle to the second.

Differences between European and Greenland birds. The appearance of European or Russian white-fronted geese, of the subspecies A. a. albifrons and Greenland white-fronted geese, of the subspecies A. a. flavirostris (which winters in the British Isles and occasionally reaches the northwest European mainland), differ in a number of ways. …

The North American midcontinent birds of the subspecies A. a. gambeli – which in 2010 had a fall population around 710,000 birds – breeds from the Alaska North Slope across the western and central Canadian Arctic. The Pacific white-fronted goose of the American Pacific coast, which in 2010 numbered approximately 650,000 birds, and the tule geese, which are estimated to number 10,000 birds, nest in western Alaska. The midcontinent geese gather in early fall on the prairies of western Saskatchewan and eastern Alberta, spending several weeks feeding before heading to wintering areas near the Gulf of Mexico, into northern Mexico. The Pacific birds migrate south along the Pacific coast, staging primarily in the Klamath Basin of southern Oregon and northern California and wintering, eventually, in California's Central Valley. The tule goose is somewhat rare and has been since the latter half of the 19th century; presumably it was affected by destruction of its wintering habitat due to human settlement. In the British Isles, two subspecies overwinter: Greenland birds in Scotland and Ireland, and Russian birds in England and Wales. They gather on farmland at favoured traditional sites, with a famous flock gathering at WWT Slimbridge, Gloucestershire, England. …