Lesser Scaup vs Mute Swan
Aythya affinis comparado com Cygnus olor
Side-by-Side Comparison
| Atributo | Lesser Scaup | Mute Swan |
|---|---|---|
| Nome científico | Aythya affinis | Cygnus olor |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | 152,0 cm (59.8 in) |
| Envergadura | 39,6 cm (15.6 in) | 235,0 cm (92.5 in) |
| Peso | 853,75 g (30.12 oz) | 11000,0 g (388.01 oz) |
| Dieta | Dives for molluscs, crustaceans, and aquatic invertebrates in coastal habitats; hard-shelled benthic prey dominates diet. | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| Tamanho da postura | 6-14 | 5-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Lesser Scaup
Breeds on boreal lakes, ponds, and wetlands in Canada and Alaska. Winters on large lakes, reservoirs, coastal bays, and freshwater across the southern United States, Mexico, and Central America. Often in large rafts.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Song & Call Comparison
Lesser Scaup
Male produces a soft, low purring call; female gives a harsh, nasal scaup sound. Voice nearly identical to Greater Scaup but slightly higher; flocks create a burbling, nasal chatter.
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
Lesser Scaup
Breeds in the forested interior of central Canada; winters on large lakes and rivers of the southeastern United States.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
Estado de conservação
Lesser Scaup
Mute Swan
How to Tell Them Apart
Lesser Scaup
Males have peaked purple-glossed black head; white flanks; black breast and undertail; gray back. Yellow eye. Smaller than Greater Scaup with peaked crown. Females dark brown with white face patch. …
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
Lesser Scaup
O pato-bastardo é um pato mergulhador pequeno de zonas húmidas de água doce da América do Norte. Os machos têm cabeça preta iridescente com reflexos roxos, pescoço e peito pretos, e flancos brancos. É muito semelhante ao pato-islandez mas ligeiramente menor com cabeço mais arredondado. Hiberna em zonas húmidas costeiras e de interior. É um dos patos mergulhadores mais abundantes na América do Norte. Alimenta-se frequentemente de mexilhões de zebra invasores, que podem ter impactos de saúde negativos.
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.