Belcher's Gull vs Aleutian Tern
Larus belcheri compared with Onychoprion aleuticus
Side-by-Side Comparison
| Attribute | Belcher's Gull | Aleutian Tern |
|---|---|---|
| Scientific Name | Larus belcheri | Onychoprion aleuticus |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Vulnerable |
| Length | — | — |
| Wingspan | 73.0 cm (28.7 in) | 52.4 cm (20.6 in) |
| Weight | 642.5 g (22.66 oz) | 104.88 g (3.70 oz) |
| Diet | -- | -- |
| Clutch Size | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Belcher's Gull
Vulnerable
Aleutian Tern
About These Birds
Belcher's Gull
Belcher's Gull, 49–52 cm, is endemic to the Humboldt Current coast of Peru and northern Chile. Black mantle, white body, yellow bill with red and black band. Piscivore and scavenger; closely associated with fishing ports and anchovy-rich upwelling waters. Resident along its narrow coastal range.
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.