Henderson Petrel vs Antarctic Petrel
Pterodroma atrata compared with Thalassoica antarctica
Side-by-Side Comparison
| Attribute | Henderson Petrel | Antarctic Petrel |
|---|---|---|
| Scientific Name | Pterodroma atrata | Thalassoica antarctica |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Endangered | Least Concern |
| Length | — | — |
| Wingspan | 59.0 cm (23.2 in) | 59.2 cm (23.3 in) |
| Weight | 320.0 g (11.29 oz) | 658.3333333333334 g (23.22 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Endangered
Henderson Petrel
Least Concern
Antarctic Petrel
About These Birds
Henderson Petrel
36–38 cm. All-dark gadfly petrel; sooty-brown with slightly paler primary patch below. Breeds Henderson Island (Pitcairn Islands). Endangered; population estimated at 5,000–10,000 pairs but vulnerable to introduced rats. Ranges in South Pacific; feeds at night on squid.
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.