Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for the Southwestern Willow Flycatcher (Empidonax traillii extimus)

We, the U.S. Fish and Wildlife Service (Service), are designating critical habitat for the southwestern willow flycatcher (Empidonax traillii extimus) pursuant to the Endangered Species Act of 1973, as amended (Act). In total, approximately 48,896 hectares (ha) (120,824 acres (ac)) or 1,186 kilometers (km) (737 miles (mi)) fall within the boundaries of the critical habitat designation. The critical habitat is located in Apache, Cochise, Gila, Graham, Greenlee, Maricopa, Mohave, Pinal, Pima, and Yavapai counties in Arizona (AZ), Kern, Santa Barbara, San Bernardino, and San Diego counties in southern California (CA), Clark County in southeastern Nevada (NV), Grant, Hidalgo, Mora, Rio Arriba, Soccoro, Taos, and Valencia counties in New Mexico (NM), and Washington County in Southwestern Utah (UT).