Brent Goose vs Bufflehead
Branta bernicla เปรียบเทียบกับ Bucephala albeola
Side-by-Side Comparison
| คุณสมบัติ | Brent Goose | Bufflehead |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Branta bernicla | Bucephala albeola |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 63.9 cm (25.2 in) | 32.2 cm (12.7 in) |
| น้ำหนัก | 1335.0 g (47.09 oz) | 400.5 g (14.13 oz) |
| อาหาร | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Dives for aquatic insects, crustaceans, and small molluscs in freshwater and coastal habitats. One of … |
| จำนวนไข่ | 1-10 | 5-14 |
| Population Trend | — | — |
Habitat Comparison
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
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.
Bufflehead
Male produces a soft, squeaky whistle; female gives a harsh, nasal quack. The male's thin, reedy whistle is barely audible; pairs exchange quiet contact calls at boreal forest ponds.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Bufflehead
Breeds in boreal forest of western and central North America. Winters along both coasts and interior lakes from southern Canada south to Mexico.
สถานะการอนุรักษ์
Brent Goose
Bufflehead
How to Tell Them Apart
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.
Bufflehead
Male has iridescent green-purple head with a large triangular white patch from behind eye over crown; body clean white except for black back. Female is dark sooty-brown with a single …
About These Birds
Brent Goose
A small dark-bodied goose with a black head and neck, small white neck patches, and pale grey belly. Migrates between high-Arctic breeding grounds and temperate coastal wintering areas. Feeds on eel-grass and saltmarsh vegetation in winter. Three subspecies differ in belly coloration.
Bufflehead
North America's smallest diving duck (~400 g), family Anatidae, males iridescent purple-green with a large white head patch. Breeds in forested areas near ponds and lakes, nesting in woodpecker cavities; winters on coastal bays and inland waters. Feeds on aquatic invertebrates and small fish. Least Concern with stable populations.