Geographic Variation in the Pocket Gopher, Thomomys Bottae, in Colorado

Published in 1958, 'Geographic Variation in the Pocket Gopher, Thomomys Bottae, in Colorado' by Phillip M. Youngman is a scientific study examining the geographic distribution and variation of the pocket gopher species in Colorado. The work analyzes 249 specimens, identifying six distinct subspecies adapted to various ecological zones. Youngman details their physical characteristics, such as coloration and skull shape, while exploring the influence of geographic factors on their habitat preferences across Colorado's diverse landscapes.