1. Elephants Without Borders P.O. Box 682 Kasane Botswana
2. Vulcan Inc. 505 5th Avenue South Seattle Washington 98104 USA
3. Department of Biology University of Washington Box 351800 Seattle Washington 98195 USA
4. Africa Program Wildlife Conservation Society Bronx Zoo, 2300 Southern Boulevard Bronx New York 10460 USA
5. Faculty of Geo‐Information Science and Earth Observation University of Twente Enschede The Netherlands
6. Conservation Information Monitoring Unit Tanzania Wildlife Research Institute Arusha Tanzania