A Sonoran pronghorn, in the captive-breeding program, roams the Cabeza Prieta National Wildlife Refuge. In 2002, there were only about 21 Sonoran pronghorn left in the United States. Today, there are 76 animals in the captive-breeding program, of which 31 are fawns born in the spring of 2010. Another 75 to 100 live in the wild on the refuge. "It's not like there's a book," said Larry Voyles, director of the Arizona Department of Game and Fish. "The Sonoran pronghorn was for many years managed benignly because the landscape was generally unavailable to people."