Olrog's Gull vs Black-tailed Gull
Larus atlanticus compared with Larus crassirostris
Side-by-Side Comparison
| Attribute | Olrog's Gull | Black-tailed Gull |
|---|---|---|
| Scientific Name | Larus atlanticus | Larus crassirostris |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Near Threatened | Least Concern |
| Length | — | — |
| Wingspan | 78.3 cm (30.8 in) | 72.8 cm (28.7 in) |
| Weight | 850.0 g (29.98 oz) | 675.0 g (23.81 oz) |
| Diet | -- | -- |
| Clutch Size | -- | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Near Threatened
Olrog's Gull
Least Concern
Black-tailed Gull
About These Birds
Olrog's Gull
Olrog's Gull, 55–58 cm, is an Endangered South American gull breeding in small colonies in Buenos Aires Province, Argentina. Very similar to Belcher's Gull. Piscivore; entirely dependent on mudflats and estuaries of the Buenos Aires coast. Threatened by industrial development of breeding and foraging sites.
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.