Black-billed Gull vs Aleutian Tern
Larus bulleri से तुलना Onychoprion aleuticus
Side-by-Side Comparison
| विशेषता | Black-billed Gull | Aleutian Tern |
|---|---|---|
| वैज्ञानिक नाम | Larus bulleri | Onychoprion aleuticus |
| गण | Charadriiformes | Charadriiformes |
| कुल | Laridae | Laridae |
| संरक्षण स्थिति | Near Threatened | Vulnerable |
| लंबाई | — | — |
| पंखों का फैलाव | 57.5 cm (22.6 in) | 52.4 cm (20.6 in) |
| वजन | 216.83333333333334 g (7.65 oz) | 104.88 g (3.70 oz) |
| आहार | -- | -- |
| अंडों की संख्या | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
संरक्षण स्थिति
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.