This ground-breaking volume covers 42 species of terrestrial mammal - from the red deer to the pygmy shrew, from the pine marten to the hedgehog. The subject is introduced for the first time as a single overarching field of study, including guidance on survey methods, analysis of sound recordings and appropriate software. The book covers species in Britain, Ireland, the Isle of Man and the Channel Islands. Containing nearly 300 figures in total, each species is considered in detail, with specific spectrogram examples. Furthermore, the book allows the reader access to a downloadable sound library containing more than 250 recordings. The authors have extensive experience and expertise in bioacoustics, including in the sound identification of mammals. They are also heavily involved in creating tools that use machine-learning algorithms to recognise mammal species from their calls. A real ear-opener, this will be the essential handbook for many years to come, serving ecological consultants, academics, conservationists, hobbyists and serious mammal recorders alike.