Great Shearwater vs Stejneger's Petrel
Ardenna gravis compared with Pterodroma longirostris
Side-by-Side Comparison
| Attribute | Great Shearwater | Stejneger's Petrel |
|---|---|---|
| Scientific Name | Ardenna gravis | Pterodroma longirostris |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Least Concern | Vulnerable |
| Length | — | — |
| Wingspan | 63.6 cm (25.0 in) | 42.4 cm (16.7 in) |
| Weight | 832.5 g (29.37 oz) | 140.5 g (4.96 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Great Shearwater
Vulnerable
Stejneger's 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.
Stejneger's Petrel
26 cm. Small gadfly petrel; pale grey above with dark M-mark; white below with dark partial collar and carpal bar. Breeds Juan Fernandez Islands (Chile); migrates to North Pacific. Vulnerable; closely related to Cook's Petrel; distinguished by slightly longer bill.