Endangered Status Denied for Sub-species of Sage Grouse The U.S. Fish and Wildlife Service denied Endangered Species Act protections for the Bi-State greater sage grouse, a distinct sage grouse sub-species that roams western Nevada and eastern California. The agency stated that voluntary conservation efforts by energy and ranching operations have been enough to protect populations of the bird. However, sage grouse populations across multiple states have continued to decline under these efforts efforts. Status: Finalized March 31, 2020.