Distribusi
Breeding regions are PAL. Breeding subregions are patchily in subarctic tundra of Palearctic: ne Greenland and n Scotland through subarctic Russia to Chukotskiy Pen. (ne Russia). Non breeding regions are widespread on temperate to tropical Palearctic coasts: s British Is., Madeira to Cape Verde (Macaronesia, nw of n Africa), w Mediterranean, Africa, Indian Ocean and associated gulfs, bays and islands, Australasia to North and n South is. (New Zealand) and Melanesia, n to Ryukyu Is. (=Nansei Shoto, s Japan) and e to Micronesia; rare farther e in Polynesia.
Sumber: IOC World Bird List, v