Townsend's Shearwater vs Heinroth's Shearwater
Puffinus auricularis compared with Puffinus heinrothi
Side-by-Side Comparison
| Attribute | Townsend's Shearwater | Heinroth's Shearwater |
|---|---|---|
| Scientific Name | Puffinus auricularis | Puffinus heinrothi |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Critically Endangered | Vulnerable |
| Length | — | — |
| Wingspan | 44.0 cm (17.3 in) | 35.7 cm (14.1 in) |
| Weight | 324.0 g (11.43 oz) | 82.0 g (2.89 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | -- |
| Population Trend | — | — |
Conservation Status
Critically Endangered
Townsend's Shearwater
Vulnerable
Heinroth's Shearwater
About These Birds
Townsend's Shearwater
33–35 cm. Dark above; white below with dark vent and undertail. Breeds Revillagigedo Islands (Mexico); Critically Endangered with fewer than 1,000 pairs. Threatened by introduced cats and rats; strictly nocturnal at colonies. Ranges in eastern Pacific.
Heinroth's Shearwater
27 cm. Small dark shearwater; all sooty-brown with pale bill. Breeds Solomon Islands and Papua New Guinea. Critically Endangered; extremely poorly known with only a handful of records. Breeding biology almost completely unknown; one of the rarest and least-studied seabirds.