American Black Duck vs Greater White-fronted Goose
Anas rubripes ile kıyaslandığında Anser albifrons
Side-by-Side Comparison
| Özellik | American Black Duck | Greater White-fronted Goose |
|---|---|---|
| Bilimsel Ad | Anas rubripes | Anser albifrons |
| Takım | Anseriformes | Anseriformes |
| Familya | Anatidae | Anatidae |
| Koruma Durumu | Least Concern | Least Concern |
| Uzunluk | — | — |
| Kanat Açıklığı | 53,4 cm (21.0 in) | 81,6 cm (32.1 in) |
| Ağırlık | 1211,25 g (42.73 oz) | 2471,0 g (87.16 oz) |
| Beslenme | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … |
| Kuluçka Büyüklüğü | 1-17 | 3-9 |
| Population Trend | — | — |
Habitat Comparison
Ortak Yaşam Alanları
American Black Duck only
Greater White-fronted Goose only
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
Greater White-fronted Goose
Breeds on Arctic and subarctic tundra and peatlands. Winters on estuaries, agricultural fields, freshwater marshes, and flooded meadows across Europe, Asia, and North America. One of the most widespread geese.
Song & Call Comparison
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
Greater White-fronted Goose
A loud, laughing 'kow-lyuk' or musical 'wah-wah'. Gives a distinctive high-pitched yodeling quality lacking in Greylag. Highly vocal in large winter flocks.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Greater White-fronted Goose
Breeds in the potholes region of the northern Great Plains; winters in the southern United States and along the Gulf Coast.
Koruma Durumu
American Black Duck
Greater White-fronted Goose
How to Tell Them Apart
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
Greater White-fronted Goose
Brown-gray body with white forehead patch bordered by white band at bill base. Underparts with bold irregular black bars on belly. Orange bill; orange-yellow legs. Juveniles lack white front and …
About These Birds
American Black Duck
A large dark brown dabbling duck closely resembling a very dark female Mallard, with purple speculum, yellowish-olive bill in males, and orange legs. Common in eastern North America. Hybridizes freely with Mallard; pure populations declining in the interior.
Greater White-fronted Goose
A medium-large goose with a white forehead patch, orange bill, grey-brown plumage, and variable black barring on the belly. Widespread and numerous; one of the most abundant geese in the world. Breeds across the high Arctic; winters in a wide range of temperate wetland and agricultural habitats.