Black-billed Gull vs Aleutian Tern
Larus bulleri comparé à Onychoprion aleuticus
Side-by-Side Comparison
| Attribut | Black-billed Gull | Aleutian Tern |
|---|---|---|
| Nom scientifique | Larus bulleri | Onychoprion aleuticus |
| Ordre | Charadriiformes | Charadriiformes |
| Famille | Laridae | Laridae |
| Statut de conservation | Near Threatened | Vulnerable |
| Longueur | — | — |
| Envergure | 57,5 cm (22.6 in) | 52,4 cm (20.6 in) |
| Poids | 216,83333333333334 g (7.65 oz) | 104,88 g (3.70 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Habitats partagés
Black-billed Gull only
Aucun(e)
Aleutian Tern only
Statut de conservation
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.