Andean Gull vs Greater Crested Tern
Larus serranus compared with Thalasseus bergii
Side-by-Side Comparison
| Attribute | Andean Gull | Greater Crested Tern |
|---|---|---|
| Scientific Name | Larus serranus | Thalasseus bergii |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 70.6 cm (27.8 in) | 71.6 cm (28.2 in) |
| Weight | 478.0 g (16.86 oz) | 367.75 g (12.97 oz) |
| Diet | -- | -- |
| Clutch Size | 1-4 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Andean Gull
Least Concern
Greater Crested Tern
About These Birds
Andean Gull
Andean Gull, 45–48 cm, breeds at high-altitude Andean lakes from Colombia to Argentina, typically above 3000 m. Black hood in breeding plumage; white below with grey mantle. Largely insectivore, following cattle or foraging at lake edges. Partial altitudinal migrant descending to Pacific and Atlantic coasts in winter.
Greater Crested Tern
Greater Crested Tern, 43–48 cm, is the largest crested tern of the Indo-Pacific, breeding from South Africa to Japan and Australia. Yellow-green bill, prominent black crest, grey back. Colonial breeder on sand islands; plunge-dives for fish. Partially migratory; disperses across Indian and Pacific Oceans.