Atlantic White Tern vs Hartlaub's Gull
Gygis alba so với Larus hartlaubii
Side-by-Side Comparison
| Thuộc Tính | Atlantic White Tern | Hartlaub's Gull |
|---|---|---|
| Tên Khoa Học | Gygis alba | Larus hartlaubii |
| 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) | 54,0 cm (21.3 in) |
| Khối Lượng | 138,0 g (4.87 oz) | 287,5 g (10.14 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1 | 1-5 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Least Concern
Atlantic White Tern
Least Concern
Hartlaub's 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.
Hartlaub's Gull
Hartlaub's Gull, 38–40 cm, is endemic to the Benguela Current coast of Namibia and South Africa. White with grey mantle, dark red bill. Resident; forages on beaches, at harbours, and over cold upwelling waters for fish offal and marine invertebrates. Population stable but range restricted.