Ring-necked Duck vs Spotted Whistling-duck
Aythya collaris เปรียบเทียบกับ Dendrocygna guttata
Side-by-Side Comparison
| คุณสมบัติ | Ring-necked Duck | Spotted Whistling-duck |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Aythya collaris | Dendrocygna guttata |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 39.0 cm (15.4 in) | 41.3 cm (16.3 in) |
| น้ำหนัก | 825.5 g (29.12 oz) | 677.5 g (23.90 oz) |
| อาหาร | Eats molluscs, crustaceans, and aquatic invertebrates; dives in shallow coastal water; diet dominated by benthic … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| จำนวนไข่ | 6-14 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
Ring-necked Duck only
Spotted Whistling-duck only
Ring-necked Duck
Breeds on boreal lakes and bogs in North America from Alaska and Canada south to the northern United States. Winters on freshwater lakes, reservoirs, and marshes across the southern United States, Mexico, and Caribbean.
Spotted Whistling-duck
Freshwater wetlands, rice fields, streams, and forest pools in New Guinea, Sulawesi, the Philippines, and Moluccas. Often found near forested rivers and seasonal swamps at low elevations.
Song & Call Comparison
Ring-necked Duck
Male produces a low, purring wheeze; female gives a harsh, rolling quack. The purring male call is understated; found on North American freshwater lakes; female calls are emphatic and nasal.
Spotted Whistling-duck
A musical, high whistle similar to other whistling-ducks. Call is softer and less far-carrying than White-faced or Black-bellied species. Given in flight and on water.
Geographic Range & Migration
Ring-necked Duck
Breeds in western Arctic Canada and Alaska; winters along the Pacific coast from Alaska to Baja California.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
สถานะการอนุรักษ์
Ring-necked Duck
Spotted Whistling-duck
How to Tell Them Apart
Ring-necked Duck
Males black back and breast; gray flanks with white vertical mark near breast. Iridescent dark purple head with subtle chestnut neck ring. Bill blue-gray with white ring near tip. Females …
Spotted Whistling-duck
Dark brown above; head and neck dark brown. Underparts heavily spotted white on dark brown ground, giving spotted appearance. Flanks with bold white spots. Pink-red bill and legs. Sexes similar.
About These Birds
Ring-necked Duck
A medium-sized diving duck. Males have a glossy black head and breast, white flank stripe, and a grey bill with a white ring near the tip; females are brown. Named for an inconspicuous brown neck ring. Common in North America. Dives for aquatic plants and invertebrates.
Spotted Whistling-duck
A small dark brown whistling-duck with bold white spots on its flanks, orange-red bill and legs, and a pale face. Found in tropical wetlands of New Guinea, the Philippines, and Indonesia. Often found near freshwater streams and flooded grassland. Less gregarious than other whistling-ducks.