1. United Nations Environment Programme World Conservation Monitoring Centre; Cambridge CB3 0DL UK
2. Computational Ecology and Environmental Science; Microsoft Research; Cambridge CB1 2FB UK
3. Department of Biology; Dalhousie University; Halifax NS Canada B3H 4R2
4. Department of Computer Science; University of Oxford; Oxford OX1 3QD UK
5. School of Life Sciences; University of Sussex; Falmer Brighton BN1 9QG UK