Special Thanks The expeditions @ fieldmuseum™ program is generously funded by The Negaunee Foundation. This season's expedition to the Division of Mammals is supported by The Field Museum. The Tanzania Mammal Key was developed based on a grant from the John D. and Catherine T. MacArthur Foundation and the Women's Board of The Field Museum. We are also grateful to the countless students and volunteers that have helped to prepare and organize the mammal specimens that make up our collection. Thanks to all of our supporters, the Museum’s mammal collection is one of the most important mammal resources around.