Inca Tern vs Aleutian Tern
Larosterna inca compared with Onychoprion aleuticus
Side-by-Side Comparison
| Attribute | Inca Tern | Aleutian Tern |
|---|---|---|
| Scientific Name | Larosterna inca | Onychoprion aleuticus |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Near Threatened | Vulnerable |
| Length | — | — |
| Wingspan | 55.4 cm (21.8 in) | 52.4 cm (20.6 in) |
| Weight | 199.5 g (7.04 oz) | 104.88 g (3.70 oz) |
| Diet | -- | -- |
| Clutch Size | 1-2 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Near Threatened
Inca Tern
Vulnerable
Aleutian Tern
About These Birds
Inca Tern
Inca Tern, 39–42 cm, is unmistakable — dark slate grey with white facial plumes curling from the bill like a Victorian moustache. Restricted to the Humboldt Current from Peru to Chile. Piscivore; snatches anchovies and other prey at the surface. Near Threatened; population tied to anchovy availability.
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.