Redhead vs Mallard
Aythya americana 비교 대상 Anas platyrhynchos
Side-by-Side Comparison
| 속성 | Redhead | Mallard |
|---|---|---|
| 학명 | Aythya americana | Anas platyrhynchos |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | 58.0 cm (22.8 in) |
| 날개 폭 | 43.7 cm (17.2 in) | 90.0 cm (35.4 in) |
| 체중 | 1055.0 g (37.21 oz) | 1100.0 g (38.80 oz) |
| 식성 | Dives for molluscs, crustaceans, and aquatic invertebrates in shallow coastal water; hard-shelled benthic prey dominates … | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| 산란 수 | 7-14 | 4-18 |
| Population Trend | — | — |
Size Comparison
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.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
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.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
Geographic Range & Migration
Redhead
Breeds in boreal and temperate North America; winters from southern Canada to northern South America along both coasts.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
보전 상태
Redhead
Mallard
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 …
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
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.
Mallard
가장 잘 알려진 야생 오리로 체장 50–65cm이며, 수컷은 광택 있는 녹색 머리와 노란 부리, 자주빛 갈색 가슴, 흰색 목 고리를 갖는다. 북반구 전역과 호주에 귀화하여 온대 내지 아열대 습지, 호수, 강, 도시 공원에 서식한다. 잡식성으로 식물, 곤충, 작은 어류를 먹는다. 관심 필요 종이다.