The CD version of STOKES FIELD GUIDE TO BIRD SONGS: WESTERN REGION offers you the very best recordings available for the birds of western North America. It includes 551 species—more species, more time per species, and more sounds per species than any other guide to western bird sounds. In addition, the sounds are accompanied by an informative booklet that gives descriptions of the circumstances under which the calls were given as well as the month and state or province in which they were given.For beginning and advanced bird watchers and nature lovers of all kinds, here is a unique highly detailed package that allows listeners to identify Eastern region birds by both songs and calls. Including more species, more time per species and more sounds per species than any other guide to eastern bird song, this program also offers a companion booklet providing an introduction to bird sounds and specific information about each bird and the function of each sound.