Black-headed Gull vs Aleutian Tern
Larus ridibundus compared with Onychoprion aleuticus
Side-by-Side Comparison
| Attribute | Black-headed Gull | Aleutian Tern |
|---|---|---|
| Scientific Name | Larus ridibundus | Onychoprion aleuticus |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Vulnerable |
| Length | — | — |
| Wingspan | 58.2 cm (22.9 in) | 52.4 cm (20.6 in) |
| Weight | 261.0 g (9.21 oz) | 104.88 g (3.70 oz) |
| Diet | -- | -- |
| Clutch Size | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Shared Habitats
Black-headed Gull only
None
Aleutian Tern only
None
Conservation Status
Least Concern
Black-headed Gull
Vulnerable
Aleutian Tern
About These Birds
Black-headed Gull
Black-headed Gull, 38–44 cm, is one of Europe's commonest gulls, breeding across the Palearctic on wetlands and coasts. Chocolate-brown (not black) hood in summer, lost in winter leaving dark ear-spot. Omnivore; follows ploughs, scavenges in cities, dips for invertebrates. Migratory.
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.