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
Lost in the Desert 3) and Chopin's Polonaise no. 6 in A-flat major, op. 53 ("Polonaise héroïque") almost become "de facto" themes for the film. Some of the climactic portions of the Liebestraum form a sweeping sonic backdrop to early scenes in the desert (before the crash landing), showing a lunch stop in the empty desert and then taking off and resuming the flight. There is a striking and emotionally intense scene in which Dirkie's father is practising the Polonaise at home and his worry about Dirkie causes him to have a sudden emotional breakdown, in which he interrupts his playing by hitting the