Black-tailed Gull vs Aleutian Tern
Larus crassirostris comparé à Onychoprion aleuticus
Side-by-Side Comparison
| Attribut | Black-tailed Gull | Aleutian Tern |
|---|---|---|
| Nom scientifique | Larus crassirostris | Onychoprion aleuticus |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Least Concern | Vulnerable |
| Longueur | — | — |
| Envergure | 72,8 cm (28.7 in) | 52,4 cm (20.6 in) |
| Poids | 675,0 g (23.81 oz) | 104,88 g (3.70 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 2-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Habitats partagés
Black-tailed Gull only
Aucun(e)
Aleutian Tern only
Statut de conservation
Least Concern
Black-tailed Gull
Vulnerable
Aleutian 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.
Aleutian Tern
Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.