Grey Petrel vs Balearic Shearwater
Procellaria cinerea compared with Puffinus mauretanicus
Side-by-Side Comparison
| Attribute | Grey Petrel | Balearic Shearwater |
|---|---|---|
| Scientific Name | Procellaria cinerea | Puffinus mauretanicus |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Near Threatened | Critically Endangered |
| Length | — | — |
| Wingspan | 65.2 cm (25.7 in) | 48.4 cm (19.1 in) |
| Weight | 1140.0 g (40.21 oz) | 514.8 g (18.16 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Near Threatened
Grey Petrel
Critically Endangered
Balearic Shearwater
About These Birds
Grey Petrel
48 cm, wingspan 119–130 cm. Grey petrel with pale yellowish bill; white underparts. Breeds Tristan da Cunha, Gough, Auckland, Antipodes, Crozet, and Kerguelen. Unique among petrels in breeding in winter; feeds on fish and squid. Near Threatened; bycatch in longline fisheries.
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.