Black-billed Gull vs Black-tailed Gull
Larus bulleri comparé à Larus crassirostris
Side-by-Side Comparison
| Attribut | Black-billed Gull | Black-tailed Gull |
|---|---|---|
| Nom scientifique | Larus bulleri | Larus crassirostris |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Near Threatened | Least Concern |
| Longueur | — | — |
| Envergure | 57,5 cm (22.6 in) | 72,8 cm (28.7 in) |
| Poids | 216,83333333333334 g (7.65 oz) | 675,0 g (23.81 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 1-3 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Statut de conservation
Near Threatened
Black-billed Gull
Least Concern
Black-tailed Gull
About These Birds
Black-billed Gull
Black-billed Gull, 35–38 cm, is endemic to New Zealand, breeding on South Island braided riverbeds. All-white plumage with a slender black bill and black-tipped wings. Endangered; river modification and mammal predation depress breeding success. Insectivore and piscivore in river and coastal habitats.
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.