MacGillivray's Prion vs Heinroth's Shearwater
Pachyptila macgillivrayi compared with Puffinus heinrothi
Side-by-Side Comparison
| Attribute | MacGillivray's Prion | Heinroth's Shearwater |
|---|---|---|
| Scientific Name | Pachyptila macgillivrayi | Puffinus heinrothi |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Critically Endangered | Vulnerable |
| Length | — | — |
| Wingspan | 38.6 cm (15.2 in) | 35.7 cm (14.1 in) |
| Weight | 162.5 g (5.73 oz) | 82.0 g (2.89 oz) |
| Diet | -- | -- |
| Clutch Size | -- | -- |
| Population Trend | — | — |
Conservation Status
Critically Endangered
MacGillivray's Prion
Vulnerable
Heinroth's Shearwater
About These Birds
MacGillivray's Prion
25–27 cm. Medium-billed prion intermediate between Broad-billed and Fairy prions; pale blue-grey with dark M-mark. Breeds St. Paul and Amsterdam islands in southern Indian Ocean. Very restricted range; feeds on zooplankton and small crustaceans at sea surface.
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.