Puffinus heinrothi
Heinroth's Shearwater (*Puffinus heinrothi*) is an enigmatic and exceedingly rare medium-sized seabird, measuring approximately 27-30 cm (10.6-11.8 inches) in length with a wingspan of 60-65 cm (23.6-25.6 inches). Its plumage is characterized by a sleek, dark blackish-brown on the upperparts, head, and flanks, contrasting sharply with a clean white belly. A key identification feature is its entirely dark underwing, distinguishing it from many other shearwater species with white underwing lini...
This pelagic species inhabits tropical and subtropical oceanic waters, breeding on remote, often steep and forested volcanic islands or rocky islets.
The diet primarily consists of small pelagic fish and squid, supplemented by crustaceans, which are caught through surface-seizing or shallow pursuit dives.
Heinroth's Shearwater exhibits strongly nocturnal behavior at its elusive breeding colonies, arriving and departing under the cover of darkness to avoid aerial predators like frigatebirds or owls. During the day, they are pelagic, soaring gracefully low over the ocean surface with stiff, rapid wi...
Heinroth's Shearwater has an extremely restricted and poorly understood distribution, primarily centered around the Bismarck Archipelago and Solomon Islands in the western Pacific Ocean. Known breeding sites are incredibly few and scattered, with confirmed colonies or strong evidence from islands...
Endangered
- Heinroth's Shearwater is one of the world's most poorly known seabirds, with fewer than 10 confirmed breeding locations ever documented, making its full life cycle a significant ornithological mystery. - Its breeding colonies are notoriously difficult to find, with birds only coming ashore unde...