Aleutian Tern vs West African Crested Tern
Onychoprion aleuticus so với Thalasseus albididorsalis
Side-by-Side Comparison
| Thuộc Tính | Aleutian Tern | West African Crested Tern |
|---|---|---|
| Tên Khoa Học | Onychoprion aleuticus | Thalasseus albididorsalis |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Vulnerable | Not Evaluated |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 52,4 cm (20.6 in) | — |
| Khối Lượng | 104,88 g (3.70 oz) | 380,0 g (13.40 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-4 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Aleutian Tern only
West African Crested Tern only
Không
Tình Trạng Bảo Tồn
Vulnerable
Aleutian Tern
Not Evaluated
West African Crested Tern
About These Birds
Aleutian Tern
Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.
West African Crested Tern
West African Crested Tern, 42–45 cm, breeds on Atlantic islands from Mauritania to Angola. Pale grey back, orange bill, black crest. Piscivore; forages along the rich upwelling zone off West Africa. Recently split from Lesser Crested Tern. Coastal and offshore forager in tropical waters.