This open-access book offers a profound exploration of the acoustic world of animals. Organized into nine chapters by taxonomy—invertebrates, insects, amphibians, reptiles, fishes, birds, and mammals (subterranean, terrestrial, and marine)—it delves into sound production, sound reception, sound function, and the impacts of noise on these creatures. As the second volume of Exploring Animal Behavior Through Sound, it builds upon the bioacoustic concepts and methodologies established in the first volume. By attuning ourselves to the sounds of nature, we can gain valuable insights into animal behavior, distribution, and demographics, as well as their habitat characteristics and needs, and the effects of noise on their behavior. This book will serve as a valuable resource for students and researchers in animal ecology seeking to incorporate acoustics into their research toolkit, as well as for environmental managers in industry and government.