Herald Petrel vs Heinroth's Shearwater
Pterodroma heraldica compared with Puffinus heinrothi
Side-by-Side Comparison
| Attribute | Herald Petrel | Heinroth's Shearwater |
|---|---|---|
| Scientific Name | Pterodroma heraldica | Puffinus heinrothi |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Least Concern | Vulnerable |
| Length | — | — |
| Wingspan | 56.2 cm (22.1 in) | 35.7 cm (14.1 in) |
| Weight | 278.5 g (9.82 oz) | 82.0 g (2.89 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | -- |
| Population Trend | — | — |
Conservation Status
Least Concern
Herald Petrel
Vulnerable
Heinroth's Shearwater
About These Birds
Herald Petrel
37 cm. Polymorphic petrel; pale morph has white underparts with dark M-mark and partial collar; dark morph sooty brown. Breeds widely across central and south Pacific islands. Ranges in tropical Pacific; feeds on squid and fish. Closely related to Kermadec Petrel.
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.