Brent Goose vs Bufflehead
Branta bernicla 비교 대상 Bucephala albeola
Side-by-Side Comparison
| 속성 | Brent Goose | Bufflehead |
|---|---|---|
| 학명 | Branta bernicla | Bucephala albeola |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 63.9 cm (25.2 in) | 32.2 cm (12.7 in) |
| 체중 | 1335.0 g (47.09 oz) | 400.5 g (14.13 oz) |
| 식성 | 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 … |
| 산란 수 | 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.
보전 상태
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
검은 머리와 목, 작은 흰 목 반점, 연한 회색 배를 가진 작은 어두운 몸통의 기러기입니다. 고위도 북극 번식지와 온대 해안 월동지 사이를 이동합니다. 겨울에 잘피와 염습지 식생을 먹습니다. 세 아종이 배 색상이 다릅니다.
Bufflehead
북미에서 가장 작은 잠수오리(약 400g)로, 수컷은 큰 흰 머리 반점이 있는 자줏빛 녹색 홍채를 가집니다. 딱따구리 구멍에 둥지를 틀어 연못과 호수 근처 삼림 지역에서 번식하며, 해안 만과 내륙 수역에서 월동합니다. 수생 무척추동물과 소형 물고기를 먹습니다. 안정적 개체수의 관심대상 종입니다.