MADEIRAN STORM-PETREL Oceanodroma castro

The Madeiran Storm-petrel is distributed throughout the tropical Atlantic and Pacific Oceans. The population on Ascension is thought to number about 3,000 birds, almost all of which are on Boatswainbird Island. Birds have also been seen around the stacks in Pillar Bay and may also breed there. Madeiran Storm-petrels are primarily nocturnal in their colony attendance, although birds can occasionally be seen around Boatswainbird Island during the day in the breeding season between October and April.