1. Department of Zoology, University of Cambridge , Cambridge , United Kingdom
2. DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, University of Cape Town , Rondebosch, Cape Town , South Africa
3. Computer Laboratory, University of Cambridge , Cambridge , United Kingdom
4. Department of Ecology and Evolutionary Biology, Princeton University , Princeton, NJ , United States
5. School of Engineering and Applied Sciences, Harvard University , Cambridge, MA , United States
6. Department of Physics, Harvard University , Cambridge, MA , United States
7. Department of Organismic and Evolutionary Biology, Harvard University , Cambridge, MA , United States