Slender-billed Prion vs Balearic Shearwater
Pachyptila belcheri compared with Puffinus mauretanicus
Side-by-Side Comparison
| Attribute | Slender-billed Prion | Balearic Shearwater |
|---|---|---|
| Scientific Name | Pachyptila belcheri | Puffinus mauretanicus |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Least Concern | Critically Endangered |
| Length | — | — |
| Wingspan | 35.2 cm (13.9 in) | 48.4 cm (19.1 in) |
| Weight | 152.0 g (5.36 oz) | 514.8 g (18.16 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Slender-billed Prion
Critically Endangered
Balearic Shearwater
About These Birds
Slender-billed Prion
25–26 cm. Slenderest-billed prion; pale blue-grey with faint M-mark and narrow dark breast-side patches. Breeds Falkland Islands, Kerguelen, Crozet. Feeds mainly on copepods by surface-seizing rather than filter-feeding. Slightly longer wings give more buoyant flight.
Balearic Shearwater
30–38 cm. Brown above; variably dirty-white to brown below; often shows brown smudging on flanks. Breeds only Balearic Islands, Spain. Critically Endangered with fewer than 3,000 pairs; faces extinction. Migrates to NE Atlantic; threatened by predators, fishing bycatch, and tourist development.