The Utah Prairie Dog (Cynomys parvidens) is the smallest of the Prairie Dog species. Between 1925 and 1975 the population was reduced in size by nearly 87% by poisoning, habitat loss, and introduced plague. They were classified as endangered as part of the Endangered Species Act in 1973, and then reclassified as threatened in 1984.
To learn more go to:
http://www.prairiedogcoalition.org/pd-utah-prairie-dog.php