Assertion: petrel's population | /r/HasProperty | at least 4,000 birds
Facets:
Source sentences:
text: The related black-capped petrel, or diablotin (P. hasitata), of the West Indies was also thought extinct (because of predation by humans, rats, and mongooses) until in 1961 a substantial population, estimated to number at least 4,000 birds, was found breeding in the inaccessible forested cliffs of Hispaniola.
text: The related black-capped petrel, or diablotin (P. hasitata), of the West Indies was also thought extinct (because of predation by humans, rats, and mongooses) until in 1961 a substantial population, estimated to number at least 4,000 birds, was found breeding in the inaccessible forested cliffs of Hispaniola.