Great Shearwater vs Small Saint Helena Petrel
Ardenna gravis comparé à Bulweria bifax
Side-by-Side Comparison
| Attribut | Great Shearwater | Small Saint Helena Petrel |
|---|---|---|
| Nom scientifique | Ardenna gravis | Bulweria bifax |
| Ordre | Procellariiformes | Procellariiformes |
| Famille | Procellariidae | Procellariidae |
| Statut de conservation | Least Concern | Extinct |
| Longueur | — | — |
| Envergure | 63,6 cm (25.0 in) | — |
| Poids | 832,5 g (29.37 oz) | 167,17 g (5.90 oz) |
| Régime alimentaire | -- | -- |
| Taille de la couvée | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Habitats partagés
Aucun(e)
Great Shearwater only
Small Saint Helena Petrel only
Aucun(e)
Statut de conservation
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.