David Lees began training as a gardener at Hampton Court before deciding to join the Royal Marines. When he returned home, he had time to explore his fascination for wildlife and started surveying for the BTO nest recording programme. Through this work, he became part of a team studying Kestrel and Owl breeding, and carried out ringing of many species throughout the UK. A keen ornithologist, David spent time abroad, gathering evidence for the First and Second edition of this book, and providing much of the biometrical data. David sadly passed away in 2010. John Ferguson began his career as a junior laboratory technician in the Zoology Department of University College London, where museum preparation and attending lectures as a projectionist was a good grounding in animal biology, anatomy and taxonomy. He then moved on to Imperial College London, where he worked as Chief Technician, before spending time in Kuwait, and also working as a Technical Service Representative back in the UK. Michael LAWRENCE is Lecturer in Film Studies at the University of Sussex, UK. He is the author of Sabu (2014) and co-editor of The Zoo and Screen Media: Images of Exhibition and Encounter (2016). Professor Roy Brown studied Earth Sciences at University, graduating from Leeds University in 1968, before completing an MSc in Conservation and a PhD in Soil Zoology. He then went on to hold a number of academic and research posts, prior to serving as the Deputy National Park Officer at the North York Moors National Park between 1974 and 1989. Since then, he has held multiple University Chairs in Biological Sciences and Rural Resource Management, as well as publishing many books and papers on Natural History and Resource Conservation. He is currently a Visiting Professor in Epidemiology and Invasive Species Control.