Campbell Teal vs African Black Duck
Anas nesiotis مقارنةً بـ Anas sparsa
Side-by-Side Comparison
| السمة | Campbell Teal | African Black Duck |
|---|---|---|
| الاسم العلمي | Anas nesiotis | Anas sparsa |
| الرتبة | Anseriformes | Anseriformes |
| الفصيلة | Anatidae | Anatidae |
| حالة الحفاظ | Vulnerable | Least Concern |
| الطول | — | — |
| طول الجناح | 24,4 cm (9.6 in) | 49,5 cm (19.5 in) |
| الوزن | 358,75 g (12.65 oz) | 996,8333333333334 g (35.16 oz) |
| النظام الغذائي | Eats molluscs, crustaceans, and aquatic invertebrates in coastal and freshwater habitats; diet varies with season. | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … |
| عدد البيض في الوضع | 5-6 | 4-9 |
| Population Trend | — | — |
Habitat Comparison
Campbell Teal
Restricted to Campbell Island and Dent Island in the subantarctic New Zealand group. Dense tussock grassland, rocky shores, and freshwater streams. Nocturnal or crepuscular. Highly sedentary.
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.
Song & Call Comparison
Campbell Teal
Female produces a very soft quacking note; male gives a faint squeak. Near-silent; rarely vocalizes; the reduced call apparatus mirrors the species' severely limited wingspan and near-flightlessness.
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.
Geographic Range & Migration
Campbell Teal
Breeds in sub-Arctic freshwater lakes of Canada; winters along the Pacific coast from Alaska to Baja California.
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
حالة الحفاظ
Campbell Teal
African Black Duck
How to Tell Them Apart
Campbell Teal
Very dark brown plumage; males have iridescent green head gloss and white eye-ring. Females dark brown with white eye-ring. Flightless; tiny vestigial wings. Recovered from near-extinction on Campbell Island, New …
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 …
About These Birds
Campbell Teal
A tiny flightless teal with dark brown plumage in females and males with greenish-black head. Endemic to Campbell Island, New Zealand. Nearly extinct; reintroduced after eradication of Norway rats from the island. Nocturnal; feeds on invertebrates at freshwater sources.
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.