Ross's Goose vs Mute Swan
Anser rossii comparado com Cygnus olor
Side-by-Side Comparison
| Atributo | Ross's Goose | Mute Swan |
|---|---|---|
| Nome científico | Anser rossii | Cygnus olor |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | 152,0 cm (59.8 in) |
| Envergadura | 69,2 cm (27.2 in) | 235,0 cm (92.5 in) |
| Peso | 1513,5 g (53.39 oz) | 11000,0 g (388.01 oz) |
| Dieta | Eats aquatic plants, seeds, and grasses near wetlands; omnivorous in breeding; takes invertebrates in shallow … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| Tamanho da postura | 2-8 | 5-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Ross's Goose
Breeds on tundra near Hudson Bay and the central Canadian Arctic. Winters in agricultural fields, rice paddies, and wetlands in the central and southern United States, particularly California's Central Valley.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Song & Call Comparison
Ross's Goose
A high, nasal yelping 'whoik' or 'hoik' — higher-pitched than Snow Goose. Flocks mix with Snow Geese; calls differ noticeably by pitch. Fast, repeated notes in flight.
Mute Swan
Despite its name, not truly mute: gives hissing snorts and low grunting when threatened. Wings produce a loud rhythmic whistling throbbing sound in flight.
Geographic Range & Migration
Ross's Goose
Breeds in high Arctic tundra; winters at sea in the North Atlantic from Iceland to the British Isles and northeastern United States.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Estado de conservação
Ross's Goose
Mute Swan
How to Tell Them Apart
Ross's Goose
Smallest white North American goose; pure white plumage with black wingtips. Short triangular pink bill with warty pinkish-gray base. Pink-red legs. Occasional blue morph. Sexes similar.
Mute Swan
All-white plumage in adults. Cygnets are grey-brown, gradually whitening over the first year. Graceful S-curved neck posture is distinctive.
Orange bill with a prominent black knob at the base, larger in males
About These Birds
Ross's Goose
O ganso-de-ross é o menor ganso branco da América do Norte. Assemelha-se ao ganso-branco mas é consideravelmente menor com bico mais curto, arredondado e sem o sorriso preto característico do ganso-branco. Cria em colónias densas na tundra ártica canadiana. Hiberna no Vale Central da Califórnia e no Sul dos Estados Unidos. As populações têm crescido dramaticamente nas últimas décadas, tornando-se um dos poucos gansos cujas populações têm aumentado significativamente.
Mute Swan
The mute swan is one of the heaviest flying birds, with males weighing up to 14 kg. Despite its name, it is not truly mute, producing hissing, grunting, and snorting sounds. Mute swans form lifelong pair bonds and their aggressive defense of nesting territory is well known.