Grey Teal vs American Black Duck
Anas gracilis 비교 대상 Anas rubripes
Side-by-Side Comparison
| 속성 | Grey Teal | American Black Duck |
|---|---|---|
| 학명 | Anas gracilis | Anas rubripes |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 38.4 cm (15.1 in) | 53.4 cm (21.0 in) |
| 체중 | 504.25 g (17.79 oz) | 1211.25 g (42.73 oz) |
| 식성 | Dives for molluscs, crustaceans, and aquatic invertebrates in shallow coastal and freshwater habitats; diet dominated … | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … |
| 산란 수 | 7-8 | 1-17 |
| Population Trend | — | — |
Habitat Comparison
Grey Teal
Freshwater and saline wetlands across Australia and New Zealand, including temporary pans, lakes, rivers, and estuaries. Highly nomadic in Australia following unpredictable rainfall. Less nomadic in New Zealand.
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
Song & Call Comparison
Grey Teal
Female gives a high, nasal descending quacking series; male produces a soft, piping whistle. The high-pitched quacking call is distinctive; flocks create a musical chattering on Australian wetlands.
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
Geographic Range & Migration
Grey Teal
Breeds across northern North America in boreal and sub-Arctic zones; winters on both coasts and inland waters of the US.
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
보전 상태
Grey Teal
American Black Duck
How to Tell Them Apart
Grey Teal
Pale gray-brown body finely spotted and scaled dark. Head pale gray-buff with fine dark spots. Red eye. White throat. Iridescent green speculum with white front border. Gray bill; gray legs. …
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
About These Birds
Grey Teal
회색 틸은 오스트레일리아와 뉴질랜드에 널리 분포하며, 다양한 습지와 호수에 서식합니다. 깔끔한 회갈색 깃털을 가진 소형 오리로, 수면을 떠다니며 먹이를 찾는 행동이 특징입니다.
American Black Duck
아메리카 검정 오리는 북아메리카 동부에 서식하는 중간 크기의 오리로, 말라드와 매우 유사하지만 전체적으로 더 어둡고 뚜렷한 보라색 날개 거울을 가지고 있습니다.