Aleutian Tern vs Black-naped Tern
Onychoprion aleuticus comparé à Sterna sumatrana
Side-by-Side Comparison
| Attribut | Aleutian Tern | Black-naped Tern |
|---|---|---|
| Nom scientifique | Onychoprion aleuticus | Sterna sumatrana |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Vulnerable | Least Concern |
| Longueur | — | — |
| Envergure | 52,4 cm (20.6 in) | 43,1 cm (17.0 in) |
| Poids | 104,88 g (3.70 oz) | 103,75 g (3.66 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 1-4 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Habitats partagés
Aleutian Tern only
Black-naped Tern only
Aucun(e)
Statut de conservation
Vulnerable
Aleutian Tern
Least Concern
Black-naped 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.
Black-naped Tern
Black-naped Tern, 30–32 cm, breeds on tropical Indo-Pacific coral islands from the Maldives to Polynesia. White overall with a narrow black nape band connecting the black lores — a delicate, elegant pattern. Piscivore; surface-dips and shallow dives in clear tropical waters over reefs.