Great Shearwater vs Black-vented Shearwater
Ardenna gravis ile kıyaslandığında Puffinus opisthomelas
Side-by-Side Comparison
| Özellik | Great Shearwater | Black-vented Shearwater |
|---|---|---|
| Bilimsel Ad | Ardenna gravis | Puffinus opisthomelas |
| Takım | Procellariiformes | Procellariiformes |
| Familya | Procellariidae | Procellariidae |
| Koruma Durumu | Least Concern | Near Threatened |
| Uzunluk | — | — |
| Kanat Açıklığı | 63,6 cm (25.0 in) | 46,6 cm (18.3 in) |
| Ağırlık | 832,5 g (29.37 oz) | 420,5833333333333 g (14.84 oz) |
| Beslenme | -- | -- |
| Kuluçka Büyüklüğü | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Ortak Yaşam Alanları
Hiçbiri
Great Shearwater only
Black-vented Shearwater only
Koruma Durumu
Least Concern
Great Shearwater
Near Threatened
Black-vented Shearwater
About These Birds
Great Shearwater
43–51 cm, wingspan 105–122 cm. Large; dark brown above with white underparts, dark cap, and distinctive scaly pattern on upperwing. Breeds Tristan da Cunha, Gough, and Falklands; migrates to North Atlantic. Feeds on fish and squid; spectacular post-breeding migration past UK coasts.
Black-vented Shearwater
30–38 cm. Dark above with blackish undertail and vent; white below. Breeds islands off Baja California; ranges offshore in eastern Pacific to Peru. Near Threatened; affected by introduced predators on breeding islands. Feeds on fish; often seen from Baja California shore.