Aleutian Tern vs Snowy-crowned Tern
Onychoprion aleuticus comparé à Sterna trudeaui
Side-by-Side Comparison
| Attribut | Aleutian Tern | Snowy-crowned Tern |
|---|---|---|
| Nom scientifique | Onychoprion aleuticus | Sterna trudeaui |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Vulnerable | Least Concern |
| Longueur | — | — |
| Envergure | 52,4 cm (20.6 in) | 51,2 cm (20.2 in) |
| Poids | 104,88 g (3.70 oz) | 149,75 g (5.28 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 1-4 | 2-4 |
| Population Trend | — | — |
Habitat Comparison
Habitats partagés
Aleutian Tern only
Snowy-crowned Tern only
Aucun(e)
Statut de conservation
Vulnerable
Aleutian Tern
Least Concern
Snowy-crowned 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.
Snowy-crowned Tern
Snowy-crowned Tern, 33–35 cm, breeds along the Atlantic coasts of Argentina and Uruguay, wintering north to southern Brazil. White crown with black post-ocular mark (unlike a full black cap), yellow-tipped red bill. Coastal and estuarine piscivore; plunge-dives for small fish.