Grey-headed Gull vs Aleutian Tern
Larus cirrocephalus compared with Onychoprion aleuticus
Side-by-Side Comparison
| Attribute | Grey-headed Gull | Aleutian Tern |
|---|---|---|
| Scientific Name | Larus cirrocephalus | Onychoprion aleuticus |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Vulnerable |
| Length | — | — |
| Wingspan | 63.8 cm (25.1 in) | 52.4 cm (20.6 in) |
| Weight | 357.5 g (12.61 oz) | 104.88 g (3.70 oz) |
| Diet | -- | -- |
| Clutch Size | 2-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Grey-headed Gull
Vulnerable
Aleutian Tern
About These Birds
Grey-headed Gull
Grey-headed Gull, 39–42 cm, breeds across sub-Saharan Africa and coastal South America. Pale grey hood in breeding plumage, red-orange bill and legs. Omnivore and piscivore; frequents large lakes, rivers, and coasts. Partially migratory, dispersing broadly outside breeding season.
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.