Black-tailed Gull vs Black Skimmer
Larus crassirostris เปรียบเทียบกับ Rynchops niger
Side-by-Side Comparison
| คุณสมบัติ | Black-tailed Gull | Black Skimmer |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Larus crassirostris | Rynchops niger |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Laridae | Laridae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 72.8 cm (28.7 in) | 73.1 cm (28.8 in) |
| น้ำหนัก | 675.0 g (23.81 oz) | 293.6666666666667 g (10.36 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 2-3 | 1-6 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
Least Concern
Black-tailed Gull
Least Concern
Black Skimmer
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 Skimmer
Black Skimmer: 40–50 cm, the largest skimmer with jet black upperparts, white underparts, and an outsized red-and-black bill with protruding lower mandible. Inhabits large rivers, estuaries, and coastal lagoons of North and South America. Feeds at dawn and dusk by skimming water surface. Nests colonially on sandy beaches. Partly migratory.