tall, dead trees that are left standing in the woods. References Burt and Grossenheider, 1976. A Field Guide to the Mammals, 3rd ed. Houghton Mifflin Company. Boston. Cahalane, Victor Harrison, 1954. Mammals of North America. MacMillan Company N.Y. pg 417-424. Jones, J. Knox, et al, 1983. Mammals of the Northern Great Plains. University of Nebraska Press. Lincoln, NE. Rue, Lenard Lee, 1967. Pictoral Guide to the Mammals of North America. Crowell. pg 87-91.