Andean Gull vs Grey-backed Tern
Larus serranus compared with Onychoprion lunatus
Side-by-Side Comparison
| Attribute | Andean Gull | Grey-backed Tern |
|---|---|---|
| Scientific Name | Larus serranus | Onychoprion lunatus |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 70.6 cm (27.8 in) | 52.2 cm (20.6 in) |
| Weight | 478.0 g (16.86 oz) | 126.21666666666665 g (4.45 oz) |
| Diet | -- | -- |
| Clutch Size | 1-4 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Andean Gull
Least Concern
Grey-backed 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.
Grey-backed Tern
Grey-backed Tern, 35–37 cm, is a Pacific seabird breeding on islands from Hawaii to Micronesia and Polynesia. Pale grey back distinguishes it from the similar Bridled Tern; white below with black cap. Piscivore; surface-dips and shallow plunge-dives. Largely pelagic when not breeding.