Breeds in Canada and Greenland, south to Maine, Iceland, Jan Mayen, Faeroes,
Spitsbergen, Bear Islands and Novaya Zembla and north-west Russia (White
Sea), coastal trough Norway, Sweden, British Isles and Ireland to the channel
Islands, and North-west France.
Breeds in colony's, mostly in borrows on grassy maritime slopes and sea
cliffs, also in boulder fields and scree slopes.
Length 32 cm.
Wingspan 55 cm.
The birds assemble before the coast in early spring. After a few days they
go to shore "en masse". Courtship is accompanied with bill clapping and
Sand eels, whiting and sprat.
One single egg is laid and is incubated by both parents for 6 weeks.