Geographic Variation in Red-backed Mice (Genus Clethrionomys) of the Southern Rocky Mountain Region

"Geographic Variation in Red-backed Mice (Genus Clethrionomys) of the Southern Rocky Mountain Region" by E. Lendell Cockrum is a scientific study that explores the different types of red-backed mice living in the southern Rocky Mountains, written around the 1950's. The scientists writing this publication wanted to understand exactly how to classify these small creatures, because the mice in different areas weren't all the same. The scientists looked closely at things like their fur and skull measurements to figure out the unnamed subspecies in places like Wyoming, Colorado, New Mexico, and Arizona. By carefully describing what makes each subspecies unique, this book helps us understand how these mice have changed to fit into their different homes and teaches us more about nature.