Black-tailed Gull vs Heermann's Gull
Larus crassirostris compared with Larus heermanni
Side-by-Side Comparison
| Attribute | Black-tailed Gull | Heermann's Gull |
|---|---|---|
| Scientific Name | Larus crassirostris | Larus heermanni |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Near Threatened |
| Length | — | — |
| Wingspan | 72.8 cm (28.7 in) | 67.2 cm (26.5 in) |
| Weight | 675.0 g (23.81 oz) | 448.26666666666665 g (15.81 oz) |
| Diet | -- | -- |
| Clutch Size | 2-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Black-tailed Gull
Near Threatened
Heermann's Gull
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.
Heermann's Gull
Heermann's Gull, 46–51 cm, is distinctive — dark grey body, white head (breeding), red bill. Breeds almost entirely on Isla Rasa in the Gulf of California, then disperses north along the Pacific coast to British Columbia. Kleptoparasite; steals fish from Brown Pelicans. Near Threatened; range highly restricted.