Black-billed Gull vs Aleutian Tern
Larus bulleri comparado com Onychoprion aleuticus
Side-by-Side Comparison
| Atributo | Black-billed Gull | Aleutian Tern |
|---|---|---|
| Nome científico | Larus bulleri | Onychoprion aleuticus |
| Ordem | Charadriiformes | Charadriiformes |
| Família | Laridae | Laridae |
| Estado de conservação | Near Threatened | Vulnerable |
| Comprimento | — | — |
| Envergadura | 57,5 cm (22.6 in) | 52,4 cm (20.6 in) |
| Peso | 216,83333333333334 g (7.65 oz) | 104,88 g (3.70 oz) |
| Dieta | -- | -- |
| Tamanho da postura | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
Black-billed Gull only
Nenhum
Aleutian Tern only
Estado de conservação
Near Threatened
Black-billed Gull
Vulnerable
Aleutian Tern
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.
Aleutian Tern
Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.