Black Tern vs Aleutian Tern
Chlidonias niger से तुलना Onychoprion aleuticus
Side-by-Side Comparison
| विशेषता | Black Tern | Aleutian Tern |
|---|---|---|
| वैज्ञानिक नाम | Chlidonias niger | Onychoprion aleuticus |
| गण | Charadriiformes | Charadriiformes |
| कुल | Laridae | Laridae |
| संरक्षण स्थिति | Least Concern | Vulnerable |
| लंबाई | — | — |
| पंखों का फैलाव | 40.3 cm (15.9 in) | 52.4 cm (20.6 in) |
| वजन | 73.15 g (2.58 oz) | 104.88 g (3.70 oz) |
| आहार | -- | -- |
| अंडों की संख्या | 2-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
संरक्षण स्थिति
Least Concern
Black Tern
Vulnerable
Aleutian Tern
About These Birds
Black Tern
Black Tern, 22–24 cm, breeds on freshwater marshes of North America and Eurasia. Breeding plumage: sooty black body, grey wings. Insectivore and piscivore; buoyant, dipping flight over wetlands. Migratory; winters off West African coasts and in tropical America. Declining in Europe.
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.