Black-tailed Gull vs Roseate Tern
Larus crassirostris เปรียบเทียบกับ Sterna dougallii
Side-by-Side Comparison
| คุณสมบัติ | Black-tailed Gull | Roseate Tern |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Larus crassirostris | Sterna dougallii |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Laridae | Laridae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 72.8 cm (28.7 in) | 44.8 cm (17.6 in) |
| น้ำหนัก | 675.0 g (23.81 oz) | 114.33333333333333 g (4.03 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 2-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
Least Concern
Black-tailed Gull
Least Concern
Roseate Tern
About These Birds
Black-tailed Gull
Black-tailed Gull, 44–48 cm, is common on East Asian coasts from Russia to China, Japan, and Korea. Grey mantle, white body, yellow bill with red spot and black subterminal band, yellow legs. Omnivore; very vocal, known as the 'cat gull' for its mewing calls. Migratory; winters south to Vietnam.
Roseate Tern
Roseate Tern, 33–36 cm, is a globally distributed but declining species, breeding on both sides of the Atlantic, Indian Ocean, and Pacific. Nearly white with a rosy flush to breast in spring, very long tail streamers, and mostly black bill. Plunge-dives for small fish. Endangered in parts of range.