This volume investigates the biological diversity and behavioral patterns of fauna inhabiting the western regions of North America. The authors, Dennis and Esther Schmidt, utilize their expertise in natural history to compile a comprehensive survey of regional species. The text serves as a foundational reference, organizing data through systematic classification and observational analysis to provide a clear understanding of the ecological roles these animals occupy within their respective habitats.

Experts recognize this work as a reliable field reference for students and amateur naturalists interested in regional zoology. Readers frequently note the clarity of the plates and the accessible organization of the biological data provided throughout the text.