diversity of any state in the U.S. with nearly 550 species documented within its borders including over 300 species known to breed. At a biological crossroad between east and west and north and south, the state's birdlife is influenced by the Rocky Mountains, Great Plains, Great Basin and Chihuahuan deserts, and the sierras of northwest Mexico. An elevational range from lowland desert and rivers below 3,000 feet to alpine tundra over 13,000 feet also greatly contributes to its diversity. This Fourth Edition of the New Mexico Bird Finding Guide contains chapters covering each of the state's 33 counties addressing nearly 400 birding locations to explore. These include easily accessed, well known destinations as well as sites that are obscure and remote. Detailed maps, directions, and lists of expected and 'specialty' species accompany each location. The guide also includes an annotated checklist presenting the status, distribution, frequency, and abundance, for all species recorded in the state. This will be a valuable reference for resident and visiting birders alike.