Cook's Petrel vs Antarctic Petrel
Pterodroma cookii compared with Thalassoica antarctica
Side-by-Side Comparison
| Attribute | Cook's Petrel | Antarctic Petrel |
|---|---|---|
| Scientific Name | Pterodroma cookii | Thalassoica antarctica |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Vulnerable | Least Concern |
| Length | — | — |
| Wingspan | 42.6 cm (16.8 in) | 59.2 cm (23.3 in) |
| Weight | 194.33333333333334 g (6.85 oz) | 658.3333333333334 g (23.22 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Vulnerable
Cook's Petrel
Least Concern
Antarctic Petrel
About These Birds
Cook's Petrel
26–30 cm, wingspan 66 cm. Pale grey above with dark M-mark; white underparts with dark partial collar and carpal bar. Breeds only on islands off New Zealand (Little Barrier, Codfish). Vulnerable; migrates to North Pacific. Feeds on squid and crustaceans.
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.