Black Tern vs Aleutian Tern
Chlidonias niger ile kıyaslandığında Onychoprion aleuticus
Side-by-Side Comparison
| Özellik | Black Tern | Aleutian Tern |
|---|---|---|
| Bilimsel Ad | Chlidonias niger | Onychoprion aleuticus |
| Takım | Charadriiformes | Charadriiformes |
| Familya | Laridae | Laridae |
| Koruma Durumu | Least Concern | Vulnerable |
| Uzunluk | — | — |
| Kanat Açıklığı | 40,3 cm (15.9 in) | 52,4 cm (20.6 in) |
| Ağırlık | 73,15 g (2.58 oz) | 104,88 g (3.70 oz) |
| Beslenme | -- | -- |
| Kuluçka Büyüklüğü | 2-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Koruma Durumu
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.