Birding Montana (Falcon Guide)
Written by Terry McEneaney, the staff ornithologist for Yellowstone National Park and one of the most respected birders in Montana, this useful and comprehensive guide is loaded with information on Montana specialties, migration paths, and seasonal availability.  This book takes you on a tour of the best birding sites from the west slope of the Rock Mountains to the eastern prairies, including Glacier and Yellowstone National Parks.