zapus hudsonius and Microtus pennsylvanicus were trapped in Deer Draw in association with white-footed mice.
"Mammals of Northwestern South Dakota"
Kenneth W. Andersen
zapus princeps princeps J. A. Allen.
"Mammals of the Grand Mesa, Colorado"
Sydney Anderson
Alcorn took zapus in grassy areas at the edge of water, in an old gravel pit, and at the site of an old sawmill.
"Mammals taken Along the Alaska Highway"
Rollin H. Baker