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By: Safford, Roger - Duckworth, J W - Evans, Michael I. - Telfer, Mark G. - Timmins, R. J. - Zewdie, ChemereType: ArticleIn: ScopusVolume: 16Series:Issue:Date: 1993Page Range: 61--80Publication Info: Nairobi, East Africa Natural History Society's Ornithological Sub-committee,Subjects: