Andean Gull vs Grey-backed Tern
Larus serranus comparé à Onychoprion lunatus
Side-by-Side Comparison
| Attribut | Andean Gull | Grey-backed Tern |
|---|---|---|
| Nom scientifique | Larus serranus | Onychoprion lunatus |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Least Concern | Least Concern |
| Longueur | — | — |
| Envergure | 70,6 cm (27.8 in) | 52,2 cm (20.6 in) |
| Poids | 478,0 g (16.86 oz) | 126,21666666666665 g (4.45 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 1-4 | 1 |
| Population Trend | — | — |
Habitat Comparison
Statut de conservation
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.