Black-billed Gull vs Aleutian Tern
Larus bulleri verglichen mit Onychoprion aleuticus
Side-by-Side Comparison
| Merkmal | Black-billed Gull | Aleutian Tern |
|---|---|---|
| Wissenschaftlicher Name | Larus bulleri | Onychoprion aleuticus |
| Ordnung | Charadriiformes | Charadriiformes |
| Familie | Laridae | Laridae |
| Erhaltungsstatus | Near Threatened | Vulnerable |
| Länge | — | — |
| Flügelspannweite | 57,5 cm (22.6 in) | 52,4 cm (20.6 in) |
| Gewicht | 216,83333333333334 g (7.65 oz) | 104,88 g (3.70 oz) |
| Ernährung | -- | -- |
| Gelegegröße | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Gemeinsame Lebensräume
Black-billed Gull only
-
Aleutian Tern only
Erhaltungsstatus
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.