books.google.com - Remote photography and infrared sensors are widely used in the sampling of wildlife populations worldwide, especially for cryptic or elusive species. Guiding the practitioner through the entire process of using camera traps, this book is the first to compile state-of-the-art sampling techniques for the...http://books.google.com/books/about/Camera_traps_in_animal_ecology.html?id=onO2967GdPwC&utm_source=gb-gplus-shareCamera traps in animal ecology