Juan Fernandez Petrel vs Balearic Shearwater
Pterodroma externa compared with Puffinus mauretanicus
Side-by-Side Comparison
| Attribute | Juan Fernandez Petrel | Balearic Shearwater |
|---|---|---|
| Scientific Name | Pterodroma externa | Puffinus mauretanicus |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Vulnerable | Critically Endangered |
| Length | — | — |
| Wingspan | 58.3 cm (23.0 in) | 48.4 cm (19.1 in) |
| Weight | 432.5 g (15.26 oz) | 514.8 g (18.16 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Shared Habitats
None
Juan Fernandez Petrel only
Balearic Shearwater only
Conservation Status
Vulnerable
Juan Fernandez Petrel
Critically Endangered
Balearic Shearwater
About These Birds
Juan Fernandez Petrel
43 cm, wingspan 97 cm. Large; dark grey-brown above with white nape and underparts; dark carpal bar and partial collar. Breeds Juan Fernandez Islands (Chile); ranges across subtropical Pacific. Vulnerable due to small breeding range; feeds on fish and squid.
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.