Lesser Scaup vs Mallard
Aythya affinis comparado com Anas platyrhynchos
Side-by-Side Comparison
| Atributo | Lesser Scaup | Mallard |
|---|---|---|
| Nome científico | Aythya affinis | Anas platyrhynchos |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | 58,0 cm (22.8 in) |
| Envergadura | 39,6 cm (15.6 in) | 90,0 cm (35.4 in) |
| Peso | 853,75 g (30.12 oz) | 1100,0 g (38.80 oz) |
| Dieta | Dives for molluscs, crustaceans, and aquatic invertebrates in coastal habitats; hard-shelled benthic prey dominates diet. | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| Tamanho da postura | 6-14 | 4-18 |
| 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.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
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.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking 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.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
Estado de conservação
Lesser Scaup
Mallard
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. …
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
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.
Mallard
The mallard is the ancestor of most domestic duck breeds and the most abundant and widespread dabbling duck in the world. Males perform elaborate courtship displays including head-bobbing and whistle-grunt calls. Mallards are highly adaptable, thriving in both wilderness and urban environments.