Black-tailed Gull vs Black-naped Tern
Larus crassirostris เปรียบเทียบกับ Sterna sumatrana
Side-by-Side Comparison
| คุณสมบัติ | Black-tailed Gull | Black-naped Tern |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Larus crassirostris | Sterna sumatrana |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Laridae | Laridae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 72.8 cm (28.7 in) | 43.1 cm (17.0 in) |
| น้ำหนัก | 675.0 g (23.81 oz) | 103.75 g (3.66 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 2-3 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
Least Concern
Black-tailed Gull
Least Concern
Black-naped 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.
Black-naped Tern
Black-naped Tern, 30–32 cm, breeds on tropical Indo-Pacific coral islands from the Maldives to Polynesia. White overall with a narrow black nape band connecting the black lores — a delicate, elegant pattern. Piscivore; surface-dips and shallow dives in clear tropical waters over reefs.