Habitat
In breeding season, generally unihabited islands among rocky cracks and burrows. In non-breeding season, pelagic, often in flocks, dispersing from breeding areas as the sea freezes.
Voice
Nosiy in and around colonies giving buzzing, chattering notes in a series, 'beedeer beedeer beedeer beedeer bideer bideer bidi bidi bidi bidee', a high-pitched kitten-like 'meew'. Generally silent at sea.