Redhead vs Mallard
Aythya americana เปรียบเทียบกับ Anas platyrhynchos
Side-by-Side Comparison
| คุณสมบัติ | Redhead | Mallard |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Aythya americana | Anas platyrhynchos |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | 58.0 cm (22.8 in) |
| กว้างปีก | 43.7 cm (17.2 in) | 90.0 cm (35.4 in) |
| น้ำหนัก | 1055.0 g (37.21 oz) | 1100.0 g (38.80 oz) |
| อาหาร | 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 … |
| จำนวนไข่ | 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.
สถานะการอนุรักษ์
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
A medium-sized diving duck. Males have a rounded rufous-red head, black breast and rear, and grey body; females are brown. Highly parasitic breeder—females frequently lay eggs in other ducks' nests. Found across North America. Winters on large bays and coastal waters.
Mallard
The mallard is the ancestor of most domestic duck breeds and the most abundant and widespread dabbling duck in the world. Males perform elaborate courtship displays including head-bobbing and whistle-grunt calls. Mallards are highly adaptable, thriving in both wilderness and urban environments.