American Black Duck vs Australian Shelduck
Anas rubripes 비교 대상 Tadorna tadornoides
Side-by-Side Comparison
| 속성 | American Black Duck | Australian Shelduck |
|---|---|---|
| 학명 | Anas rubripes | Tadorna tadornoides |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 53.4 cm (21.0 in) | 70.7 cm (27.8 in) |
| 체중 | 1211.25 g (42.73 oz) | 1424.5 g (50.25 oz) |
| 식성 | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Dabbles for aquatic invertebrates, seeds, and plant material in spring; forages in shallow ponds; diet … |
| 산란 수 | 1-17 | 5-19 |
| Population Trend | — | — |
Habitat Comparison
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.
Australian Shelduck
Inland salt lakes, ephemeral lakes, estuaries, coastal bays, and agricultural dams in southern Australia from Queensland west to Western Australia. Nests in burrows, hollow logs, and tree cavities.
Song & Call Comparison
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.
Australian Shelduck
Male gives a whistling 'zzzeet'; female gives a loud, deep cackling 'uk-uk-uk'. Loud, far-carrying calls from Australian wetlands. Considered one of the noisier shelducks.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Australian Shelduck
Breeds across the Palearctic from Iceland and western Europe east to Siberia; winters in Africa, South Asia, and Southeast Asia.
보전 상태
American Black Duck
Australian Shelduck
How to Tell Them Apart
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 …
Australian Shelduck
Males dark chestnut with black head showing green gloss; white neck collar. White inner wing with iridescent green speculum. Females have white eye-ring and white facial area. Chestnut breast; black …
About These Birds
American Black Duck
아메리카 검정 오리는 북아메리카 동부에 서식하는 중간 크기의 오리로, 말라드와 매우 유사하지만 전체적으로 더 어둡고 뚜렷한 보라색 날개 거울을 가지고 있습니다.
Australian Shelduck
A large shelduck with a dark bottle-green head, chestnut breast band in females, and dark body with white wing coverts. Common in southern Australia. One of Australia's largest ducks. Gregarious and conspicuous; forms flocks on inland salt lakes and coastal bays.