This work investigates the biological complexity, evolutionary history, and ecological significance of bat species residing within the British Isles. John D. Altringham, a recognized expert in chiropteran biology, synthesizes decades of field research and anatomical study to provide a definitive reference. The text frames the bat not merely as a nocturnal curiosity, but as a highly specialized mammal whose survival strategies offer profound insights into evolutionary adaptation and environmental conservation.

As part of the esteemed New Naturalist series, this volume is regarded as a standard reference for both professional biologists and dedicated naturalists. The text provides a rigorous, data-driven examination of its subject, maintaining the high academic standards expected of the series while remaining accessible to the informed reader.