ENDANGERED SPECIES ACT PROFILE

PROTECTION STATUS: Threatened

YEAR PLACED ON LIST: 2000

CRITICAL HABITAT: 8,305 acres in Los Angeles County, California designated in 2005

RANGE: Parts of the Santa Ana, San Gabriel, and Santa Clara rivers, as well as their tributaries, including Big Tujunga Creek in southern California

THREATS: Urbanization, dams, water pollution, channelization, and poor watershed management

POPULATION TREND: During the 1970s, the Santa Ana sucker was described as common. Since then, the species has lost close to 95 percent of its historic habitat.