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 shot in two versions, one in Afrikaans and the other in English. The Afrikaans version appeared in 1969 under the title "Dirkie", and the English version appeared in either 1969 or 1970 (possibly varying according to country) under the title "Dirkie Lost in the Desert", which was sometimes referred to and marketed as "Lost in the Desert", which is possibly an alternative official title for the English version. The film was released on DVD in 2005 (copyright 1999), and this disc contains both versions of the film, selectable from the front menu. The English version is about 70 minutes long,