Atlantic White Tern vs West African Crested Tern
Gygis alba so với Thalasseus albididorsalis
Side-by-Side Comparison
| Thuộc Tính | Atlantic White Tern | West African Crested Tern |
|---|---|---|
| Tên Khoa Học | Gygis alba | Thalasseus albididorsalis |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Not Evaluated |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 50,4 cm (19.8 in) | — |
| Khối Lượng | 138,0 g (4.87 oz) | 380,0 g (13.40 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Atlantic White Tern only
Không
West African Crested Tern only
Không
Tình Trạng Bảo Tồn
Least Concern
Atlantic White Tern
Not Evaluated
West African Crested Tern
About These Birds
Atlantic White Tern
Atlantic White Tern: 28–33 cm, wingspan 76–87 cm, ethereally white seabird with blue-grey bill, blue orbital ring, and large dark eyes. Breeds on tropical Atlantic islands including Ascension and Saint Helena; related species widespread across the Indo-Pacific. Nests on bare branches with no nest material. Feeds on small fish near the surface.
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.