Julian Caldecott is an ecologist and primatologist by training, doing his doctoral research on macaques in Malaysian rain forests. He has worked on wildlife management and biodiversity conservation throughout the global tropics, including projects to conserve Bornean and Sumatran orangutans, western and Nigerian chimpanzees, and Cross River gorillas. Lera Miles is a biologist with the UNEP World Conservation Monitoring Centre who analyzes threats to biodiversity ranging from global to local scales. Her specialities include species mapping and modeling, vulnerability assessment, and priority-setting.