Black-billed Gull vs Andean Gull
Larus bulleri compared with Larus serranus
Side-by-Side Comparison
| Attribute | Black-billed Gull | Andean Gull |
|---|---|---|
| Scientific Name | Larus bulleri | Larus serranus |
| Order | Charadriiformes | Charadriiformes |
| Family | Laridae | Laridae |
| Conservation Status | Near Threatened | Least Concern |
| Length | — | — |
| Wingspan | 57.5 cm (22.6 in) | 70.6 cm (27.8 in) |
| Weight | 216.83333333333334 g (7.65 oz) | 478.0 g (16.86 oz) |
| Diet | -- | -- |
| Clutch Size | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Near Threatened
Black-billed Gull
Least Concern
Andean Gull
About These Birds
Black-billed Gull
Black-billed Gull, 35–38 cm, is endemic to New Zealand, breeding on South Island braided riverbeds. All-white plumage with a slender black bill and black-tipped wings. Endangered; river modification and mammal predation depress breeding success. Insectivore and piscivore in river and coastal habitats.
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.