Aleutian Tern vs Roseate Tern
Onychoprion aleuticus comparé à Sterna dougallii
Side-by-Side Comparison
| Attribut | Aleutian Tern | Roseate Tern |
|---|---|---|
| Nom scientifique | Onychoprion aleuticus | Sterna dougallii |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Vulnerable | Least Concern |
| Longueur | — | — |
| Envergure | 52,4 cm (20.6 in) | 44,8 cm (17.6 in) |
| Poids | 104,88 g (3.70 oz) | 114,33333333333333 g (4.03 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 1-4 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Statut de conservation
Vulnerable
Aleutian Tern
Least Concern
Roseate Tern
About These Birds
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.
Roseate Tern
Roseate Tern, 33–36 cm, is a globally distributed but declining species, breeding on both sides of the Atlantic, Indian Ocean, and Pacific. Nearly white with a rosy flush to breast in spring, very long tail streamers, and mostly black bill. Plunge-dives for small fish. Endangered in parts of range.