- 22.4–25.2 in
- 44.9 in
- 30.3–72 oz
- Oie de Ross (French)
- Ansar de Ross, Ganso de Ross, Ganso menor (Spanish)
- Downy young come in two colors: yellow and gray. The two forms look identical once they get real feathers.
- Very rarely a Ross's Goose can be found that is dark-colored like a blue morph Snow Goose. These blue morph Ross's Geese are thought to be the result of hybridization with Snow Geese.
- Prior to the 1950s the Ross's Goose was confined to well-defined breeding and wintering areas, with few seen as strays. Since that time the species has been expanding eastward, both on the breeding and wintering grounds. The change in breeding distribution has resulted in more contact and subsequent hybridization with the Snow Goose.
- The female Ross's Goose does all of the incubation of the eggs. The male stays nearby and guards her the whole time. The female covers the eggs with down when she leaves the nest. The down keeps the eggs warm while she is away and may help hide them from predators.
- The oldest known Ross's Goose was a female, and at least 22 years, 6 months old when she was shot in California in 1993. She had been banded in 1972 in Saskatchewan.
Breeds on low arctic tundra, on islands in shallow lakes. Winters in agricultural fields and shallow wetlands.
Entirely vegetarian; grasses, sedges, legumes, and domestic grains.
- Clutch Size
- 2–6 eggs
- Egg Description
- White, usually stained during incubation.
- Condition at Hatching
- Covered with down and eyes open. Leaves nest within 24 hours of hatching and has the ability to swim and feed.
Nest a scrape in the ground lined with plant material and down feathers.
Grazes on grass.
Ross's Goose populations are relatively small, but appear to have increased since the 1990s. The species is not on the 2014 State of the Birds Watch List.
- Ryder, J. P., and R. T. Alisauskas. 1994. Ross' Goose (Chen rossii). In The Birds of North America, No. 162 (A. Poole and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia, PA, and The American Ornithologists' Union, Washington, D.C.
- North American Bird Conservation Initiative, U.S. Committee. 2014. State of the Birds 2014 Report. U.S. Department of Interior, Washington, DC.
- U.S. Fish and Wildlife Service. 2015. Waterfowl Population Status, 2015. U.S. Department of the Interior, Washington, DC.
- USGS Patuxent Wildlife Research Center. 2015. Longevity records of North American Birds.