The Razorbill is a bird of the temperate North Atlantic and adjacent parts of the Arctic Ocean. They breed on both sides of the Atlantic and in the east they breed as far south as Brittany (France), north to Svalbard and east to the White Sea in north-west Russia. Razorbills breeding in Britain and Ireland winter along the Atlantic coast of Europe from southwest Norway to Iberia and North Africa, and into the western Mediterranean. Immature Razorbills move significantly further away from their natal colonies than do adults and generally further south, though occasionally they stray west as far as Greenland and the Azores. Razorbills breed mainly on small ledges or in cracks of rocky cliffs and in associated screes, and on boulder-fields. Rarely, colonies have been found up to 1000 feet inland. Razorbills are usually associated with colonies of other seabirds, and small numbers scattered among large concentrations of Common Guillemots and Black-legged Kittiwakes can easily be overlooked. Razorbill 'nest' sites are usually hidden from view, but the presence of a colony is clearly indicated by the attendance of off-duty birds standing close by.