Chatham Islands Petrel vs Balearic Shearwater
Pterodroma axillaris compared with Puffinus mauretanicus
Side-by-Side Comparison
| Attribute | Chatham Islands Petrel | Balearic Shearwater |
|---|---|---|
| Scientific Name | Pterodroma axillaris | Puffinus mauretanicus |
| Order | Procellariiformes | Procellariiformes |
| Family | Procellariidae | Procellariidae |
| Conservation Status | Vulnerable | Critically Endangered |
| Length | — | — |
| Wingspan | 42.4 cm (16.7 in) | 48.4 cm (19.1 in) |
| Weight | 226.25 g (7.98 oz) | 514.8 g (18.16 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Vulnerable
Chatham Islands Petrel
Critically Endangered
Balearic Shearwater
About These Birds
Chatham Islands Petrel
30 cm. Small; dark grey above with white forehead and underparts; distinctive black axillaries. Critically Endangered; breeds only South East Island, Chatham Islands (few hundred pairs). Threatened by weka predation; intensive management sustains population. Ranges in temperate Pacific.
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.