Desert bighorn sheep establish two desert areas in southwestern Arizona to help preserve the desert bighorn sheep: Cabeza Prieta National Wildlife Refuge and the Kofa National Wildlife Refuge. In 1941, the San Andres National Wildlife Refuge in New Mexico was added. Desert bighorn sheep populations have trended upward since the 1960s when their population was estimated at 6,700-8,100. The upward trend was caused by conservation measures, including habitat preservation. In 1980, desert bighorn sheep populations were estimated at 8,415-9,040. A state-by-state survey was conducted a few years later and estimated the overall US desert bighorn sheep population at 15,980. The 1993 estimate of
Anza-Borrego Desert State Park 100,000 visitors each year. The institute offers in-depth field programs, a fifth grade environmental camp, citizen science research, and Parks Online Resources for Teachers and Students. ABF's mission is to protect and preserve the natural landscapes, wildlife habitat, and cultural heritage of ABDSP for the benefit and enjoyment of present and future generations. Anza-Borrego Desert State Park Anza-Borrego Desert State Park (ABDSP) is a California state park located within the Colorado Desert of southern California, United States. The park takes its name from 18th century Spanish explorer Juan Bautista de Anza and "borrego", the Spanish word for sheep. With 600,000