"Population declines of greater sage-grouse (Centrocercus urophasianus) and alterations and loss of sagebrush (Artemisia spp.) have prompted petitions to the U.S. Fish and Wildlife Service to list the species under the Endangered Species Act. Our objectives were to present an unbiased assessment from an ecological perspective of the current status and the potential factors that influenced the long-term conservation of greater sage-grouse populations and the sage brush ecosystems on which they depend"--Page 1.1