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The wintering and moult of ruffs philomachus pugnax in the Kenyan rift valley
(University of Nairobi, 1981)
Some 5700 Ruffs were ringed in the southern Kenyan rift valley during 1967–79, mainly at Lakes Nakuru and Magadi. These have produced 15 recoveries outside East Africa, 14 in Siberia between 73° and 154°E and one in ...