Emperor Goose vs Blue-billed Teal
Anser canagicus в сравнении с Spatula hottentota
Side-by-Side Comparison
| Характеристика | Emperor Goose | Blue-billed Teal |
|---|---|---|
| Научное название | Anser canagicus | Spatula hottentota |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 74,8 cm (29.4 in) | 29,4 cm (11.6 in) |
| Масса | 2300,45 g (81.15 oz) | 269,2 g (9.50 oz) |
| Питание | Grazes aquatic plants and terrestrial grasses; upends in shallow water; winter diet shifts toward grain … | Feeds on seeds, aquatic plants, and invertebrates; filter-feeds in shallow water; broadly omnivorous and seasonally … |
| Размер кладки | 1-8 | 5-12 |
| Population Trend | — | — |
Habitat Comparison
Emperor Goose
Breeds on coastal tundra near the Bering Sea in Alaska and Chukotka. Winters on rocky coastal shorelines, kelp beds, and intertidal flats along the Aleutian Islands and Alaska Peninsula.
Blue-billed Teal
Freshwater lakes, marshes, pans, and flooded grasslands across sub-Saharan Africa from Senegal and Sudan south to the Cape. Nomadic; follows seasonal rains. Common but easily overlooked among reed beds.
Song & Call Comparison
Emperor Goose
A low, nasal 'clag-clag' call. Less vocal than other Anser geese. Gives contact calls in flocks during Arctic breeding and Pacific coast wintering. Somewhat quiet.
Blue-billed Teal
Male utters a soft, teal-like peep; female gives a muted quack. Pairs call quietly in dense papyrus; soft contact calls help birds maintain proximity in thick African marsh vegetation.
Geographic Range & Migration
Emperor Goose
Breeds in the eastern Arctic of Canada; winters along the Atlantic coast from Newfoundland to Florida and occasionally to Texas.
Blue-billed Teal
Breeds in Arctic and subarctic Eurasia; winters at sea in the North Atlantic and from western Europe to eastern Africa.
Охранный статус
Emperor Goose
Blue-billed Teal
How to Tell Them Apart
Emperor Goose
Body plumage blue-gray with black and white feather scalloping. White head and hindneck contrasting with dark throat. Orange-yellow legs. Bill pink-orange. Tail white. Adults striking; sexes similar.
Blue-billed Teal
Small; males have pale blue-gray bill contrasting with brown-gray body. Head finely spotted; underparts barred brown and white. Males show powder-blue forewing in flight. Females browner. African marsh species.
About These Birds
Emperor Goose
A stocky silvery-grey goose with a white head stained orange-yellow from iron-rich water, black-and-white scaly body, and orange-yellow legs. Breeds on Alaska's Yukon-Kuskokwim delta; winters along the Aleutian Islands coastline. Strongly tied to coastal habitats year-round.
Blue-billed Teal
A small dark teal with blue-grey bill and legs, brown-streaked plumage, and fine pale spotting on the flanks. The most widespread teal in sub-Saharan Africa. Found on freshwater lakes and marshes. Highly nomadic; follows seasonal rainfall. Swims low in the water like a pochard.