This document contains a dichotomous key for identifying 8 species of mammals found in Kansas: opossum, eastern mole, Elliot's short-tailed shrew, prairie shrew, least shrew, silver-haired bat, Townsend's bat, and eastern pipistrelle. The key provides a series of yes/no questions about physical characteristics that allow the user to narrow down the identity of an unknown mammal specimen by following the provided paths through the questions.