Great Shearwater vs Small Saint Helena Petrel
Ardenna gravis comparado con Bulweria bifax
Side-by-Side Comparison
| Atributo | Great Shearwater | Small Saint Helena Petrel |
|---|---|---|
| Nombre científico | Ardenna gravis | Bulweria bifax |
| Orden | Procellariiformes | Procellariiformes |
| Familia | Procellariidae | Procellariidae |
| Estado de conservación | Least Concern | Extinct |
| Longitud | — | — |
| Envergadura | 63,6 cm (25.0 in) | — |
| Peso | 832,5 g (29.37 oz) | 167,17 g (5.90 oz) |
| Dieta | -- | -- |
| Tamaño de la puesta | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Ninguno
Great Shearwater only
Small Saint Helena Petrel only
Ninguno
Estado de conservación
Least Concern
Great Shearwater
Extinct
Small Saint Helena Petrel
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.
Small Saint Helena Petrel
Extinct; known only from subfossil bones from St. Helena Island. Smaller than Bulwer's Petrel; went extinct shortly after human settlement of St. Helena, likely from introduced predators. Part of the endemic St. Helena seabird community that was largely extirpated by human arrival.