The northern flying squirrel (Glaucomys sabrinus) listed as state endangered since 2007 and a species with a high-level of conservation concern in Pennsylvania (Wildlife Action Plan, Pennsylvania Game Commission, www.portal.state.pa.us/portal/server.pt?open=514&objID=622722&mode=2), relies on mixed coniferous forests that primarily contain red spruce (Picea rubens) and eastern hemlock (Tsuga canadensis) (Mahan et al. 2010). Eastern hemlock is declining through the Appalachians due to an exotic insect pest, the hemlock woolly adelgid (Adelges tsugae) (e.g., Rohr et al. 2009). In the face of this decline, the restoration of red spruce has been suggested as a way to protect and expand habitat for northern flying squirrels and other conifer-dependent species (e.g., West Virgina Highlands Conservancy, 2004; Mahan et al. 2010). Red spruce restoration has been initiated with some success in other portions of the northern flying squirrels’ range in the Appalachians.