Bird enthusiasts will find viewing locations and updated contact information for hundreds of sites in Wyoming, Colorado, Montana, Idaho, Alberta, and British Columbia. Part 1 outlines the habitats, ecology, and bird geography of the Rocky Mountains north of the New Mexico-Colorado border, including recent changes in the ecology and avifauna of the region. It provides detailed lists of major birding locations and guidance about where to search for specific Rocky Mountain birds. Part 2 considers all 328 regional species individually, with information on their status, habitats and ecology, suggested viewing locations, and population. Includes 3 maps and 11 drawings by the author.