Atlantic White Tern vs Slaty-backed Gull
Gygis alba so với Larus schistisagus
Side-by-Side Comparison
| Thuộc Tính | Atlantic White Tern | Slaty-backed Gull |
|---|---|---|
| Tên Khoa Học | Gygis alba | Larus schistisagus |
| 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) | 87,0 cm (34.3 in) |
| Khối Lượng | 138,0 g (4.87 oz) | 1280,5 g (45.17 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Least Concern
Atlantic White Tern
Least Concern
Slaty-backed Gull
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.
Slaty-backed Gull
Slaty-backed Gull, 55–68 cm, breeds on coasts and cliffs of the Russian Far East, wintering south to Japan and occasionally the US Pacific coast. Dark slate-grey mantle, pink legs, 'string of pearls' white mirrors on outer wing. Omnivore; scavenges at fishing ports in East Asian harbours.