Atlantic White Tern vs Snowy-crowned Tern
Gygis alba so với Sterna trudeaui
Side-by-Side Comparison
| Thuộc Tính | Atlantic White Tern | Snowy-crowned Tern |
|---|---|---|
| Tên Khoa Học | Gygis alba | Sterna trudeaui |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 50,4 cm (19.8 in) | 51,2 cm (20.2 in) |
| Khối Lượng | 138,0 g (4.87 oz) | 149,75 g (5.28 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1 | 2-4 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Least Concern
Atlantic White Tern
Least Concern
Snowy-crowned 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.
Snowy-crowned Tern
Snowy-crowned Tern, 33–35 cm, breeds along the Atlantic coasts of Argentina and Uruguay, wintering north to southern Brazil. White crown with black post-ocular mark (unlike a full black cap), yellow-tipped red bill. Coastal and estuarine piscivore; plunge-dives for small fish.