Small Saint Helena Petrel vs Balearic Shearwater
Bulweria bifax 对比 Puffinus mauretanicus
Side-by-Side Comparison
| 属性 | Small Saint Helena Petrel | Balearic Shearwater |
|---|---|---|
| 学名 | Bulweria bifax | Puffinus mauretanicus |
| 目 | Procellariiformes | Procellariiformes |
| 科 | Procellariidae | Procellariidae |
| 保护状况 | Extinct | Critically Endangered |
| 体长 | — | — |
| 翼展 | — | 48.4 cm (19.1 in) |
| 体重 | 167.17 g (5.90 oz) | 514.8 g (18.16 oz) |
| 食性 | -- | -- |
| 产卵数 | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Extinct
Small Saint Helena Petrel
Critically Endangered
Balearic Shearwater
About These Birds
Small Saint Helena Petrel
Extinct; known only from subfossil bones from St. Helena Island. Smaller than Bulwer's Petrel; went extinct shortly after human settlement of St. Helena, likely from introduced predators. Part of the endemic St. Helena seabird community that was largely extirpated by human arrival.
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.