Great Shearwater vs Bryan's Shearwater
Ardenna gravis compared with Puffinus bryani
Side-by-Side Comparison
| Attribute | Great Shearwater | Bryan's Shearwater |
|---|---|---|
| Scientific Name | Ardenna gravis | Puffinus bryani |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Least Concern | Critically Endangered |
| Length | — | — |
| Wingspan | 63.6 cm (25.0 in) | 33.0 cm (13.0 in) |
| Weight | 832.5 g (29.37 oz) | 147.0 g (5.19 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | -- |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Great Shearwater
Critically Endangered
Bryan's Shearwater
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.
Bryan's Shearwater
27 cm. Small shearwater; dark brown above, white below with dark smudging on flanks. Known from only a few specimens collected at Midway Atoll; Critically Endangered or possibly extinct. No confirmed breeding in decades; one of the least-known shearwaters.