Black-tailed Gull vs Kerguelen Tern
Larus crassirostris comparé à Sterna virgata
Side-by-Side Comparison
| Attribut | Black-tailed Gull | Kerguelen Tern |
|---|---|---|
| Nom scientifique | Larus crassirostris | Sterna virgata |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Least Concern | Near Threatened |
| Longueur | — | — |
| Envergure | 72,8 cm (28.7 in) | 50,0 cm (19.7 in) |
| Poids | 675,0 g (23.81 oz) | 127,5 g (4.50 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 2-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Statut de conservation
Least Concern
Black-tailed Gull
Near Threatened
Kerguelen 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.
Kerguelen Tern
Kerguelen Tern, 31–33 cm, is restricted to a handful of sub-Antarctic islands including Kerguelen and Crozet. Darker grey than Antarctic Tern, with reddish bill. Piscivore and invertivore; forages in kelp beds and coastal waters. Near Threatened; small, isolated population vulnerable to introduced predators.