Brent Goose vs Barrow's Goldeneye
Branta bernicla 비교 대상 Bucephala islandica
Side-by-Side Comparison
| 속성 | Brent Goose | Barrow's Goldeneye |
|---|---|---|
| 학명 | Branta bernicla | Bucephala islandica |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 63.9 cm (25.2 in) | 44.3 cm (17.4 in) |
| 체중 | 1335.0 g (47.09 oz) | 838.0 g (29.56 oz) |
| 식성 | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Dives for crustaceans, aquatic insects, and molluscs in mountain lakes and coastal bays. Diet similar … |
| 산란 수 | 1-10 | 6-14 |
| 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.
Barrow's Goldeneye
Male produces a whistled, nasal kaow-kaow call; female gives a harsh quacking series. The male's wheezy, double call differs from Common Goldeneye; heard on western North American lakes.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Barrow's Goldeneye
Breeds in Iceland, western Canada, and locally the western United States. Winters on coasts and lakes of the Pacific Northwest and eastern Canada.
보전 상태
Brent Goose
Barrow's Goldeneye
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.
Barrow's Goldeneye
Male has iridescent purple-black head with crescent-shaped white facial patch; white body with black scapulars bearing bold white spots. Female grey with brown head, white collar; head rounder than Common …
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.
Barrow's Goldeneye
수컷은 자줏빛 광택 머리와 초승달 모양 흰 얼굴 반점을 가진 중간 크기의 구멍 둥지 오리(약 840g)입니다. 북미 서부와 아이슬란드의 산악 호수 근처에서 번식하며 해안 만에서 월동합니다. 무척추동물과 소형 물고기를 잠수하여 먹습니다. 관심대상 종으로, 둥지를 위해 큰 나무 구멍에 의존합니다.