This undated image provided by the Center for Conservation Biology shows handler Bud Marks and Frehley, one of the dogs rescued from an animal shelter and trained to sniff out the rare Jemez Mountain salamander and its scat in northern New Mexico. The U.S. Fish and Wildlife Service released a proposal Tuesday Sept. 11, 2012, for listing the salamander as a federal endangered species. Marks and Frehley spent the last three weeks in the Jemez Mountains searching for salamander populations as part of a conservation project. (AP Photo/Courtesy of the Center for Conservation Biology)