Great Shearwater vs Hawaiian Petrel
Ardenna gravis compared with Pterodroma sandwichensis
Side-by-Side Comparison
| Attribute | Great Shearwater | Hawaiian Petrel |
|---|---|---|
| Scientific Name | Ardenna gravis | Pterodroma sandwichensis |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Least Concern | Endangered |
| Length | — | — |
| Wingspan | 63.6 cm (25.0 in) | 54.3 cm (21.4 in) |
| Weight | 832.5 g (29.37 oz) | 479.5 g (16.91 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Great Shearwater
Endangered
Hawaiian 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.
Hawaiian Petrel
43 cm. Dark above with white forehead; white below with dark partial collar and carpal bar. Breeds high-elevation burrowing colonies on Hawaiian mountains. Vulnerable; threatened by introduced predators, light attraction, habitat loss. Migrates to northeast Pacific after breeding.