Mountain Press Publishing. Halfpenny, James, and Elizabeth Biesiot. Mammal Tracking in Western America . No need to guess what animal passed by. This well-illustrated guide shows how to read the prints of creatures large and small.
More determined detectives can peruse the intriguing scatology chapter.
Poisonous Dwellers of the Desert . Southwest Parks and Monuments Association. Also listed are some nonvenomous animals often mistakenly believed to be poisonous. Olin, George, and Dale Thompson. Mammals of the Southwest Deserts .