Barrow's Goldeneye vs Mallard
Bucephala islandica เปรียบเทียบกับ Anas platyrhynchos
Side-by-Side Comparison
| คุณสมบัติ | Barrow's Goldeneye | Mallard |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Bucephala islandica | Anas platyrhynchos |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | 58.0 cm (22.8 in) |
| กว้างปีก | 44.3 cm (17.4 in) | 90.0 cm (35.4 in) |
| น้ำหนัก | 838.0 g (29.56 oz) | 1100.0 g (38.80 oz) |
| อาหาร | Dives for crustaceans, aquatic insects, and molluscs in mountain lakes and coastal bays. Diet similar … | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| จำนวนไข่ | 6-14 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
Barrow's Goldeneye
Male produces a whistled, nasal kaow-kaow call; female gives a harsh quacking series. The male's wheezy, double call differs from Common Goldeneye; heard on western North American lakes.
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
Barrow's Goldeneye
Breeds in Iceland, western Canada, and locally the western United States. Winters on coasts and lakes of the Pacific Northwest and eastern Canada.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
สถานะการอนุรักษ์
Barrow's Goldeneye
Mallard
How to Tell Them Apart
Barrow's Goldeneye
Male has iridescent purple-black head with crescent-shaped white facial patch; white body with black scapulars bearing bold white spots. Female grey with brown head, white collar; head rounder than Common …
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
Barrow's Goldeneye
A medium-sized cavity-nesting duck (~840 g) in family Anatidae, males with purple-glossed heads and a crescent-shaped white face patch. Breeds near mountain lakes in western North America and Iceland; winters on coastal bays. Dives for invertebrates and small fish. Least Concern; dependent on large tree cavities for nesting.
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.