birdsDucks

Ross’s Geese

Ross’s Geese (Chen rossii or Anser rossii)

The Ross’s Geese (Chen rossii or Anser rossii) is a North American goose.

Discovery and Naming of this Goose

In 1861, Mr. Bernard Ross sent a specimen of this small goose taken at the Great Slave Lake, Canada, to Mr. Cassin for identification. Mr John Cassin — at that time the Curator of Birds at the Academy of Natural Sciences – honoured Mr Ross by naming this goose after him.

Ross's Geese
Ross’s Geese

Distribution / Range

This species breeds in northern Canada and winters in the southern United States (primarily central California). Smaller numbers can also be found from Colorado to central Mexico and on the Texas coast. Scattered populations exist along the East Coast.

The Ross’s Goose is a rare vagrant in Western Europe, but it is commonly kept in wildfowl collections so the true frequency of wild birds is hard to ascertain. Individuals or small groups have turned up in Holland and Britain, however, which seemed to be of natural origin.

Description

This small white goose averages 22 to 25 inches in length and weighs between 30 to 73 ounces. The plumage is white except for black wing tips. It has dark eyes and a short, triangular pink-coloured bill. It has a round head, dark-pink legs, and a greenish-warty patch at the base of the bill.

It looks like a miniature version of the more common white-phase Snow Goose, except it is approximately 40% smaller. Also, its bill is smaller in proportion to its body and this species lacks the “black lips”. The dark phase is extremely rare.

Both genders look alike, but the male is slightly larger.

The plumage of immature birds is pale grey above and white below. There is a grey line through the eyes. Their legs, feet, and bill are grey, turning pink as they mature.

Further Goose Information

  • Ross's Geese Swimming
    Ross’s Geese Swimming

Breeding

The hen incubates the eggs while the male stays nearby and guards the nest. The female covers the eggs down when she leaves the nest, to keep the eggs warm while she is away and also to hide them from predators.

Diet / Feeding

Ross’s Geese primarily eat various grasses, sedges, legumes, and domestic grains

Ducks and geese generally feed on larvae and pupae usually found under rocks, aquatic animals, plant material, seeds, small fish, snails, and crabs.

Gordon Ramel

Gordon is an ecologist with two degrees from Exeter University. He's also a teacher, a poet and the owner of 1,152 books. Oh - and he wrote this website.

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