Heermann's Gull vs Black-bellied Tern
Larus heermanni so với Sterna acuticauda
Side-by-Side Comparison
| Thuộc Tính | Heermann's Gull | Black-bellied Tern |
|---|---|---|
| Tên Khoa Học | Larus heermanni | Sterna acuticauda |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Near Threatened | Endangered |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 67,2 cm (26.5 in) | 44,8 cm (17.6 in) |
| Khối Lượng | 448,26666666666665 g (15.81 oz) | 159,5 g (5.63 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Near Threatened
Heermann's Gull
Endangered
Black-bellied Tern
About These Birds
Heermann's Gull
Heermann's Gull, 46–51 cm, is distinctive — dark grey body, white head (breeding), red bill. Breeds almost entirely on Isla Rasa in the Gulf of California, then disperses north along the Pacific coast to British Columbia. Kleptoparasite; steals fish from Brown Pelicans. Near Threatened; range highly restricted.
Black-bellied Tern
Black-bellied Tern, 32–34 cm, is an Endangered freshwater tern of the Indian subcontinent, breeding on large river sandbars from Pakistan to Myanmar. Black belly contrasts with grey upperparts in breeding plumage; orange bill. Plunge-dives for small fish. Severely threatened by river modification.