Ring-necked Duck vs Brent Goose
Aythya collaris comparado com Branta bernicla
Side-by-Side Comparison
| Atributo | Ring-necked Duck | Brent Goose |
|---|---|---|
| Nome científico | Aythya collaris | Branta bernicla |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | — |
| Envergadura | 39,0 cm (15.4 in) | 63,9 cm (25.2 in) |
| Peso | 825,5 g (29.12 oz) | 1335,0 g (47.09 oz) |
| Dieta | Eats molluscs, crustaceans, and aquatic invertebrates; dives in shallow coastal water; diet dominated by benthic … | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … |
| Tamanho da postura | 6-14 | 1-10 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
Ring-necked Duck only
Brent Goose only
Ring-necked Duck
Breeds on boreal lakes and bogs in North America from Alaska and Canada south to the northern United States. Winters on freshwater lakes, reservoirs, and marshes across the southern United States, Mexico, and Caribbean.
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering geese.
Song & Call Comparison
Ring-necked Duck
Male produces a low, purring wheeze; female gives a harsh, rolling quack. The purring male call is understated; found on North American freshwater lakes; female calls are emphatic and nasal.
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
Geographic Range & Migration
Ring-necked Duck
Breeds in western Arctic Canada and Alaska; winters along the Pacific coast from Alaska to Baja California.
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Estado de conservação
Ring-necked Duck
Brent Goose
How to Tell Them Apart
Ring-necked Duck
Males black back and breast; gray flanks with white vertical mark near breast. Iridescent dark purple head with subtle chestnut neck ring. Bill blue-gray with white ring near tip. Females …
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
About These Birds
Ring-necked Duck
O pato-de-colar é um pato mergulhador de tamanho médio da América do Norte. Apesar do nome, o colar escuro do pescoço é difícil de observar no campo. Os machos distinguem-se pelo padrão preto e branco e pelo bico cinzento com anel branco. É o único pato mergulhador norte-americano que prefere nidificar em zonas húmidas de água doce florestais. É um dos patos mergulhadores mais abundantes da América do Norte, com uma distribuição ampla.
Brent Goose
O ganso-ruivo é um pequeno ganso marinho que cria na tundra ártica e hiberna em costas marinhas temperadas. Tem cabeça e pescoço pretos com remendo branco manchado no pescoço. As subespécies variam nas cores do ventre de pálido a escuro. Alimenta-se de ervas marinhas, alfaces-do-mar e outras plantas costeiras. As populações colapsaram nos anos 1930 devido ao declínio das ervas marinhas, mas recuperaram com o retorno destas. Estão entre os gansos que percorrem as maiores distâncias de migração.