Great Shearwater vs Large Saint Helena Petrel
Ardenna gravis compared with Pterodroma rupinarum
Side-by-Side Comparison
| Attribute | Great Shearwater | Large Saint Helena Petrel |
|---|---|---|
| Scientific Name | Ardenna gravis | Pterodroma rupinarum |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Least Concern | Extinct |
| Length | — | — |
| Wingspan | 63.6 cm (25.0 in) | — |
| Weight | 832.5 g (29.37 oz) | — |
| Diet | -- | -- |
| Clutch Size | 1 | -- |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Great Shearwater
Extinct
Large 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.
Large Saint Helena Petrel
Extinct; known only from subfossil bones found on St. Helena. Medium-large petrel that went extinct within the last few centuries, likely due to human settlement, habitat destruction, and introduced predators. Related to living Pterodroma species; part of the endemic St. Helena avifauna.