1. Department of Anthropology, Durham University, Dawson Building, South Road, Durham DH1 3LE, UK
2. Primate and Predator Project, PO Box 522, Louis Trichardt, 0920, South Africa
3. Department of Zoology, University of Venda, Private bag X5050, Thohoyandou, 0950, South Africa
4. Bainbridge Island School District, 8489 Madison Avenue NE, Bainbridge Island, WA 98110, USA