Paul Rees was a senior lecturer in the School of Science, Engineering and Environment at the University of Salford, United Kingdom, for 22 years until his retirement in 2020. He holds a BSc in Environmental Biology from the University of Liverpool and a PhD in Animal Ecology and Behavior from the University of Bradford. Paul previously lectured at three Further Education Colleges and a Higher Education College in the United Kingdom, and trained biology teachers at Sokoto College of Education in Nigeria. He has taught from GCE 'O'/GCSE level to MSc level and has been an external examiner for a range of taught programs, from Higher National Diploma to MSc level, at six British universities. Paul has published papers on mammal behavior and ecology, wildlife law, and the role of zoos in conservation, along with eight textbooks concerned with ecology, zoo biology, wildlife law and elephants. Paul is the author of three other titles in CABI's Key Questions series: Ecology, Applied Ecology and Conservation, and Biodiversity.