Length: 33-41 cm. Plumage: tail, rump, back and wings pale grey, wingtips darker grey; hind neck white; forehean white, forecrown speckled white; below white; breeding bird has pearl grey below, cheeks white; deeply forked tail extends slightly beyond wing. Immature browner on back. Bare parts: iris dark brown; bill red in breeding and black in non-breeding birds; feet and legs red in breeding and black in non-breeding. Habitat: open ocean and seashores. Palearctic migrant. <389><391><393>
- Urban, E.K., C.H. Fry & S. Keith (1986). The Birds of Africa, Volume II. Academic Press, London. http://www.marinespecies.org/aphia.php?p=sourcedetails&id=6169
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