Andean Gull vs Snowy-crowned Tern
Larus serranus compared with Sterna trudeaui
Side-by-Side Comparison
| Attribute | Andean Gull | Snowy-crowned Tern |
|---|---|---|
| Scientific Name | Larus serranus | Sterna trudeaui |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 70.6 cm (27.8 in) | 51.2 cm (20.2 in) |
| Weight | 478.0 g (16.86 oz) | 149.75 g (5.28 oz) |
| Diet | -- | -- |
| Clutch Size | 1-4 | 2-4 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Andean Gull
Least Concern
Snowy-crowned 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.
Snowy-crowned Tern
Snowy-crowned Tern, 33–35 cm, breeds along the Atlantic coasts of Argentina and Uruguay, wintering north to southern Brazil. White crown with black post-ocular mark (unlike a full black cap), yellow-tipped red bill. Coastal and estuarine piscivore; plunge-dives for small fish.