Campbell Teal vs Spotted Whistling-duck
Anas nesiotis เปรียบเทียบกับ Dendrocygna guttata
Side-by-Side Comparison
| คุณสมบัติ | Campbell Teal | Spotted Whistling-duck |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Anas nesiotis | Dendrocygna guttata |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Vulnerable | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 24.4 cm (9.6 in) | 41.3 cm (16.3 in) |
| น้ำหนัก | 358.75 g (12.65 oz) | 677.5 g (23.90 oz) |
| อาหาร | Eats molluscs, crustaceans, and aquatic invertebrates in coastal and freshwater habitats; diet varies with season. | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| จำนวนไข่ | 5-6 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
Campbell Teal only
ไม่มี
Spotted Whistling-duck only
Campbell Teal
Restricted to Campbell Island and Dent Island in the subantarctic New Zealand group. Dense tussock grassland, rocky shores, and freshwater streams. Nocturnal or crepuscular. Highly sedentary.
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
Campbell Teal
Female produces a very soft quacking note; male gives a faint squeak. Near-silent; rarely vocalizes; the reduced call apparatus mirrors the species' severely limited wingspan and near-flightlessness.
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
Campbell Teal
Breeds in sub-Arctic freshwater lakes of Canada; 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
Campbell Teal
Spotted Whistling-duck
How to Tell Them Apart
Campbell Teal
Very dark brown plumage; males have iridescent green head gloss and white eye-ring. Females dark brown with white eye-ring. Flightless; tiny vestigial wings. Recovered from near-extinction on Campbell Island, New …
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
Campbell Teal
A tiny flightless teal with dark brown plumage in females and males with greenish-black head. Endemic to Campbell Island, New Zealand. Nearly extinct; reintroduced after eradication of Norway rats from the island. Nocturnal; feeds on invertebrates at freshwater sources.
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.