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Article
O. B. Kok, Auteur ; J. M. vanZyl, Auteur
Article
G. Kopij, Auteur ; O. B. Kok, Auteur ; R. J. Nuttall, AuteurThe breeding cycle of the Southern Bald Ibis, Geronticus calvus, was studied at a colony In the eastern Free State. Birds were paired before breeding commenced and nest building began regularly two weeks before the first eggs were laid. Nesting [...]
Article
P. C. Anderson, Auteur ; O. B. Kok, Auteur ; B. H. Erasmus, AuteurA total of 229 Lesser Kestrels Falco naumannt shot by airport personnel as part of their bird control programme, was obtained from the Bloemfontein and Kimberley airports during the 1984/85, 1985/86 and 1986/87 austral summers Analysis of stomac[...]
