Redhead vs African Pygmy-goose
Aythya americana 비교 대상 Nettapus auritus
Side-by-Side Comparison
| 속성 | Redhead | African Pygmy-goose |
|---|---|---|
| 학명 | Aythya americana | Nettapus auritus |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 43.7 cm (17.2 in) | 29.9 cm (11.8 in) |
| 체중 | 1055.0 g (37.21 oz) | 272.5 g (9.61 oz) |
| 식성 | Dives for molluscs, crustaceans, and aquatic invertebrates in shallow coastal water; hard-shelled benthic prey dominates … | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| 산란 수 | 7-14 | 6-12 |
| Population Trend | — | — |
Habitat Comparison
Redhead
Breeds on prairie marshes and potholes in western North America. Winters on large bays, coastal waters, lakes, and reservoirs across the southern United States and Mexico. Large concentrations on Laguna Madre, Texas.
African Pygmy-goose
Freshwater lakes, ponds, and rivers with floating water lilies and other aquatic vegetation across sub-Saharan Africa from Senegal to Tanzania. Nests in tree cavities near water. Highly dependent on water lily vegetation.
Song & Call Comparison
Redhead
Male gives a low, mewing may-heah call; female produces a purring, rolled quacking. The mewing, nasal call is unlike any other North American duck; flocks create a cat-like chorus.
African Pygmy-goose
Male produces a soft, wheezy whistle; female gives a quiet, duck-like quack. Pairs exchange rapid twittering notes during courtship on lily-covered African pools.
Geographic Range & Migration
Redhead
Breeds in boreal and temperate North America; winters from southern Canada to northern South America along both coasts.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
보전 상태
Redhead
African Pygmy-goose
How to Tell Them Apart
Redhead
Males have rounded rufous-red head; black breast and undertail; pale gray body. Blue-gray bill with white ring and black tip. Red eye. Females brown with paler face. Rounder head than …
African Pygmy-goose
Tiny. Males have glossy dark green head with orange facial patch and ear spot; chestnut-orange flanks; white underparts; black and green back. Females duller with dark eye-stripe. Small yellow-green bill.
About These Birds
Redhead
중간 크기의 잠수오리입니다. 수컷은 둥근 붉은색 머리, 검은 가슴과 뒷부분, 회색 몸통을 가지며, 암컷은 갈색입니다. 매우 기생적인 번식 행동으로—암컷이 다른 오리 둥지에 알을 자주 낳습니다. 북미 전역에 분포합니다. 큰 만과 해안 수역에서 월동합니다.
African Pygmy-goose
A tiny jewel-like duck—one of Africa's smallest waterfowl. Males have iridescent green-and-white plumage, an orange bill, and a dark green cap; females are mottled brown. Found on lily-covered lakes in sub-Saharan Africa. Perches on water lily pads and feeds on their seeds and flowers.