Andean Gull vs River Tern
Larus serranus compared with Sterna aurantia
Side-by-Side Comparison
| Attribute | Andean Gull | River Tern |
|---|---|---|
| Scientific Name | Larus serranus | Sterna aurantia |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Vulnerable |
| Length | — | — |
| Wingspan | 70.6 cm (27.8 in) | 52.4 cm (20.6 in) |
| Weight | 478.0 g (16.86 oz) | 187.5 g (6.61 oz) |
| Diet | -- | -- |
| Clutch Size | 1-4 | 3-4 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Andean Gull
Vulnerable
River 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.
River Tern
River Tern, 38–43 cm, is a large freshwater tern of South and Southeast Asia, found along major rivers from Pakistan to Thailand. Yellow-orange bill, grey back, black cap in breeding plumage. Piscivore; plunge-dives into clear river water. Near Threatened due to river sand-mining and disturbance.