1. ElephantVoices, Sandefjord 3236, Norway.
2. Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08540, USA.
3. Big Life Foundation, 00502 Nairobi, Kenya.
4. Save the Elephants, 00200 Nairobi, Kenya.
5. Amboseli Trust for Elephants, 00509 Nairobi, Kenya.
6. The Jane Goodall Institute UK, Lymington SO41 3YL, UK.
7. Kenya Wildlife Conservancies Association, 00517 Nairobi, Kenya.
8. WildlifeDirect, 00502 Nairobi, Kenya.
9. Mpala Research Center, 10400 Nanyuki, Kenya.
10. Wildlife Conservation Professional Society of Kenya, 00202 Nairobi, Kenya.
11. Białowieża Geobotanical Station, University of Warsaw, Faculty of Biology, Białowieża 17-230, Poland.
12. Biostatistics Unit, Institute for Crop Science, University of Hohenheim, Stuttgart 70599, Germany.
13. Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen 9700 CC, Netherlands.
14. The School for Field Studies, 002009 Loitokitok, Kenya.
15. African Conservancy Foundation, 00505 Nairobi, Kenya.
16. African Conservation Center, 00509 Nairobi, Kenya.