Cory's Shearwater vs Antarctic Petrel
Calonectris borealis compared with Thalassoica antarctica
Side-by-Side Comparison
| Attribute | Cory's Shearwater | Antarctic Petrel |
|---|---|---|
| Scientific Name | Calonectris borealis | Thalassoica antarctica |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 69.4 cm (27.3 in) | 59.2 cm (23.3 in) |
| Weight | 787.5 g (27.78 oz) | 658.3333333333334 g (23.22 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Conservation Status
Least Concern
Cory's Shearwater
Least Concern
Antarctic Petrel
About These Birds
Cory's Shearwater
46–56 cm, wingspan 112–126 cm. Large shearwater; greyish-brown above with yellowish bill; white below with pale underwing. Breeds Macaronesia (Azores, Canaries, Madeira). Migrates across Atlantic to South Atlantic wintering grounds. Feeds on fish and squid; follows fishing vessels.
Antarctic Petrel
40–46 cm, wingspan 100–110 cm. Striking chocolate-brown and white pattern; only member of its genus. Breeds solely in Antarctica on cliff ledges; among the most southerly-nesting birds. Feeds on fish and krill beneath pack ice. Returns to colonies in October; one of the most abundant Antarctic seabirds.