Murn, C., 2009, 'Ecological characteristics of the White-headed Vulture Trigonoceps occipitalis' in southern Africa, in South African National Parks (eds.), Reports on scientific research projects undertaken in the savannah national parks of South African National Parks during the year 2009 and projects that were completed during 2008. Research Project Reports 2009, KNP 15/1/2-2009, p. 157, SANParks, Pretoria.