Written by two top scientists, "North American Tree Squirrels" illuminates the everyday lives of gray and fox squirrels, the two most dominant types of tree squirrels of the eastern United States. Drawing on more than 20 years of research, Michael A. Steele and John L. Koprowski detail the behaviour, reproduction, diet, physiology, and habitat use of these engaging rodents, as well as their complex interdependent relationships with seed-producing trees. The authors compare and contrast tree squirrels with other members of their family, including ground squirrels, chipmunks, marmots, and prairie dogs. In addition to scientific revelations, the authors describe their fieldwork, from the pitfalls of patrolling forests at night in order to check nest boxes to the challenges of fitting squirrels with radio-tracking collars. The book concludes with descriptions of the biology of North America's other tree squirrels.