African Black Duck vs Snow Goose
Anas sparsa 비교 대상 Anser caerulescens
Side-by-Side Comparison
| 속성 | African Black Duck | Snow Goose |
|---|---|---|
| 학명 | Anas sparsa | Anser caerulescens |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 49.5 cm (19.5 in) | 82.4 cm (32.4 in) |
| 체중 | 996.8333333333334 g (35.16 oz) | 2561.0 g (90.34 oz) |
| 식성 | -- | Grazes submerged aquatic vegetation and eelgrass in estuaries; also takes grasses and sedges on coastal … |
| 산란 수 | 4-9 | 2-6 |
| Population Trend | — | — |
Habitat Comparison
African Black Duck
Fast-flowing rocky rivers and streams, mountain gorges, and waterfalls from sea level to 4,000 m across sub-Saharan Africa from Ethiopia and Kenya south to the Cape. Requires clear turbulent water with boulders.
Snow Goose
Breeds on coastal and inland Arctic tundra in Canada, Alaska, and Greenland. Winters on agricultural fields, marshes, and coastal wetlands across the United States and northern Mexico. Forms enormous flocks.
Song & Call Comparison
African Black Duck
Produces a harsh, resonant quacking call; alarm is a loud, emphatic quack repeated rapidly. Both sexes call with strong quacking; pairs duet with synchronized calls along African rivers.
Snow Goose
A loud, nasal barking 'luk-luk' or 'kow-kow'. Large flocks create enormous noise during Arctic nesting and winter staging. Considered a noisy, conspicuous goose.
Geographic Range & Migration
African Black Duck
Snow Goose
Breeds in eastern North America's boreal forest; winters on the Atlantic coast from New England to South Carolina.
보전 상태
African Black Duck
Snow Goose
How to Tell Them Apart
African Black Duck
Dark blackish-brown plumage with bold white spots on back and scapulars. Iridescent blue-green speculum with white borders. Head dark with pale spots. Bill and legs dark gray. Sexes similar. Fast-flowing …
Snow Goose
About These Birds
African Black Duck
아프리카 검정 오리는 사하라 이남 아프리카의 산간 하천과 개울에 서식하는 중간 크기의 오리입니다. 어두운 갈색 깃털과 흰색 반점이 특징이며, 빠르게 흐르는 물에 적응되어 있습니다.
Snow Goose
눈 기러기는 캐나다 북극에서 번식하고 미국과 멕시코 만안에서 월동합니다. 두 가지 색형이 있는데 흰색형과 어두운 파란색 형이 있습니다. 농경지와 초원에서 대규모 무리를 이룹니다.