Black-tailed Gull vs Grey-backed Tern
Larus crassirostris compared with Onychoprion lunatus
Side-by-Side Comparison
| Attribute | Black-tailed Gull | Grey-backed Tern |
|---|---|---|
| Scientific Name | Larus crassirostris | Onychoprion lunatus |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 72.8 cm (28.7 in) | 52.2 cm (20.6 in) |
| Weight | 675.0 g (23.81 oz) | 126.21666666666665 g (4.45 oz) |
| Diet | -- | -- |
| Clutch Size | 2-3 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Black-tailed Gull
Least Concern
Grey-backed 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.
Grey-backed Tern
Grey-backed Tern, 35–37 cm, is a Pacific seabird breeding on islands from Hawaii to Micronesia and Polynesia. Pale grey back distinguishes it from the similar Bridled Tern; white below with black cap. Piscivore; surface-dips and shallow plunge-dives. Largely pelagic when not breeding.