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Article
Johann H. van Niekerk, Auteur ; Rodrigo Megía-Palma, Auteur ; Giovanni Forcina, AuteurThe study of intraspecific geographical variation of non-passerine vocalizations remains under-studied, especially in African species. We explored spatial patterns in call variation of the Crested Francolin Dendroperdix sephaena across its wide [...]
Article
Johann H. van Niekerk, AuteurDans Ostrich (88(3) 2017)Uniparental care often means that males do not contribute to the wellbeing of their offspring. For this reason, little attention has been given to avian species where the absent male contributes indirectly to the wellbeing of his chicks. This pa[...]
Article
Johann H. van Niekerk, AuteurDans Ostrich (84(2) 2013)Field surveys were conducted in the Krugersdorp Game Reserve, Gauteng province, South Africa, during 1978-1981 to study the habitat preferences of Helmeted Guineafowl Numida meleagris. The study area was traversed with a vehicle in the late afte[...]
Article
Johann H. van Niekerk, AuteurThis paper explains habitat use by Swainson's Spurfowl Pternistis swainsonii on maize Zea mays and livestock farms on the Highveld south-east of Johannesburg, South Africa. The purpose is to describe habitat modification methods to manipulate th[...]
Article
Johann H. van Niekerk, AuteurDans Ostrich (83(3) 2012)Fieldwork to study the vocal behaviour of Orange River Francolin Scleroptilia levaillantoides was conducted on a farm in the Heidelberg district, Gauteng province, South Africa, during August 2009 to March 2011. Orange River Francolins possess a[...]
