The University of Arizona Press

Sylvester Allred is a principal lecturer emeritus at Northern Arizona University. He is author of The Natural History of Tassel-Eared Squirrels, as well as several children’s books. He has served as an ecological consultant for the British Broadcasting Corporation, the Department of Energy, and the Discovery Channel. He currently consults with McGraw-Hill and Oxford University Press on biology, geology, environmental science, and oceanography textbooks.