Aleutian Tern vs Snowy-crowned Tern
Onychoprion aleuticus compared with Sterna trudeaui
Side-by-Side Comparison
| Attribute | Aleutian Tern | Snowy-crowned Tern |
|---|---|---|
| Scientific Name | Onychoprion aleuticus | Sterna trudeaui |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Vulnerable | Least Concern |
| Length | — | — |
| Wingspan | 52.4 cm (20.6 in) | 51.2 cm (20.2 in) |
| Weight | 104.88 g (3.70 oz) | 149.75 g (5.28 oz) |
| Diet | -- | -- |
| Clutch Size | 1-4 | 2-4 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
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.