By Greg R. Homel. Designed for birders of all levels, this illustrated, laminated guide will help you in the field. It includes photos of birds and their common habitats for easy field identification. Also includes seasonal of when they can be found in Yellowstone and Grand Teton parks. A lightweight, folded, waterproof guide to leave in the car or tuck in a daypack. 2012. 4" x 9"