PAUL A. REES is a Senior Lecturer in the School of Environmental and Life Sciences at the University of Salford, UK. His teaching and research interests include the behaviour and welfare of animals in zoos (especially elephants), particularly the importance of policy and legislation in influencing the pivotal role of zoos in the conservation of biodiversity and the welfare of animals living in zoos. He is the author of Urban Environments and Wildlife Law: A manual for Sustainable Development (Blackwell, 2002), An Introduction to Zoo Biology and Management (Wiley- Blackwell, 2011), A Dictionary of Zoo Biology and Animal Management (Wiley-Blackwell, 2013) and Studying Captive Animals (Wiley-Blackwell, 2015).