Brent Goose vs Masked Duck
Branta bernicla مقارنةً بـ Nomonyx dominicus
Side-by-Side Comparison
| السمة | Brent Goose | Masked Duck |
|---|---|---|
| الاسم العلمي | Branta bernicla | Nomonyx dominicus |
| الرتبة | Anseriformes | Anseriformes |
| الفصيلة | Anatidae | Anatidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 63,9 cm (25.2 in) | 27,6 cm (10.9 in) |
| الوزن | 1335,0 g (47.09 oz) | 361,0 g (12.73 oz) |
| النظام الغذائي | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Dives and dabbles for aquatic seeds, plant matter, and invertebrates in freshwater marshes and ponds … |
| عدد البيض في الوضع | 1-10 | 4-6 |
| Population Trend | — | — |
Habitat Comparison
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering geese.
Song & Call Comparison
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
Masked Duck
Male emits a soft, dove-like cooing note; female gives a harsh, emphatic quack. The male's gentle, almost melodic cooing is surprising for a stiff-tail; heard in tropical American marshes.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Masked Duck
Resident from Mexico and the Caribbean south through Central America to northern South America. Found in lowland freshwater marshes and lagoons.
حالة الحفاظ
Brent Goose
Masked Duck
How to Tell Them Apart
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
Masked Duck
Male is rich rufous-chestnut with black mask from forehead to face, boldly spotted black on upperparts; blue bill. Female is streaked buff and brown with two dark facial stripes crossing …
About These Birds
Brent Goose
A small dark-bodied goose with a black head and neck, small white neck patches, and pale grey belly. Migrates between high-Arctic breeding grounds and temperate coastal wintering areas. Feeds on eel-grass and saltmarsh vegetation in winter. Three subspecies differ in belly coloration.
Masked Duck
A small stiff-tailed duck (~360 g) of family Anatidae, breeding males with a black mask and chestnut body. Inhabits densely vegetated freshwater marshes and ponds from southern Texas to South America and the Caribbean. Dives for seeds and aquatic invertebrates. Secretive and rarely observed. Least Concern; tolerates a broad range of wetland habitats.