A monotypic genus, circumpolar in its breeding distribution on Arctic tundra
including coasts of Greenland. It is a medium distance migrant, although some birds only move to adjacent coasts. Wintering
mainly at sea it is often found off UK shores, also rarely inland. Both breeding and winter plumages are quite
striking, sadly intermediates seem to be the norm, due to complex protracted moults, of which there are two
annually. Added to sexual dimorphism there are several distinct plumages, which may at times all be present in
one flock.
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HOMEPAGE
