African Black Duck vs Australian Shelduck
Anas sparsa เปรียบเทียบกับ Tadorna tadornoides
Side-by-Side Comparison
| คุณสมบัติ | African Black Duck | Australian Shelduck |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Anas sparsa | Tadorna tadornoides |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 49.5 cm (19.5 in) | 70.7 cm (27.8 in) |
| น้ำหนัก | 996.8333333333334 g (35.16 oz) | 1424.5 g (50.25 oz) |
| อาหาร | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Dabbles for aquatic invertebrates, seeds, and plant material in spring; forages in shallow ponds; diet … |
| จำนวนไข่ | 4-9 | 5-19 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
African Black Duck only
ไม่มี
Australian Shelduck only
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.
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
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.
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
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
Australian Shelduck
Breeds across the Palearctic from Iceland and western Europe east to Siberia; winters in Africa, South Asia, and Southeast Asia.
สถานะการอนุรักษ์
African Black Duck
Australian Shelduck
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 …
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
African Black Duck
A medium-sized dark brown duck with white spots on the back, a dark bill, and orange legs. Found along fast-flowing rocky rivers and streams in Africa. Territorial and monogamous; pairs defend stretches of river. Related to Pacific Black Duck.
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.