It's safe to say, that I own many books on the subject of Bats. ... I can state here and now, (with certainty) that this book surpasses the others on its overall (up-to-date) content, and execution. In conclusion, the book is very well laid-out. It's very informative, and a fantastic reference, to re-visit again and again! ...Now if only a bat expert from the US (of Jon Russ' caliber) would publish a book similar to it (for North American species)...And soon! I'd be very happy!

– Al Milano, Bat Detector Reviews

Armed with this practical little book, researchers, surveyors and amateurs can go out into the night with the benefit of the knowledge and experience built up over the years by Russ and his colleagues.

– Andrew Branson, British Wildlife

A long-awaited book on bat calls has been published by Pelagic Publishing. Written by Jon Russ, it gives a very clear explanation on how echolocation and bat detectors works. There are colour illustrations of sonograms for each species of British Bat and also includes a very useful selection on bat social calls.It covers heterodyne, time expansion and frequency division. It is well set out and great for quick reference.

– Bedfordshire Bat Group