Designation of Critical Habitat for the California Tiger Salamander in Sonoma County: Proposed rule; public hearing announcement.

We, the U.S. Fish and Wildlife Service (Service), propose to designate critical habitat for the California tiger salamander (Ambystoma californiense) pursuant to the Endangered Species Act of 1973, as amended (Act). In total, approximately 74,223 acres (ac) (30,037 hectares (ha)) fall within the boundaries of the proposed critical habitat designation. The proposed critical habitat is located in Sonoma County, California.