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 Another underground nester, this species prefers piles of boulders and dry-stone walls.
Found on St Kilda and Staffa, the largest colonies in Scotland are at Treshnish, Priest Island and Mousa, where they inhabit a ruined broch.
Food: Crustaceans, small fish, cephalopods taken on the surface, carcases of whales and ship’s garbage.
Nest Site: Arrives at nest site in darkness to undisturbed islands, islets. Nests in rocky outcrops, crevices, in walls, ruins, burrows and boulder beach.
Breeding: Late May to mid June where one egg is laid.
Wintering: Winters off of South Africa.
Distribution: Mainly Scotland and west coast Ireland, northern and southern Europe.
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