Shoot Clipping by Douglas Squirrels in Regenerating Douglas Fir

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Abstract
Injuries to the upper crowns of sapling to pole-sized Douglas fir (Pseudotsuga menziesii), especially to terminal shoots, have been attributed to frost, snow, ice, aborted buds and passerine birds. A sizeable portion of such injuries in western Washington and Oregon, USA, apparently is attributable to clipping by Douglas squirrels (Tamiasciurus douglasii). Observations of such injuries are presented. Foresters and wildlife managers should be alerted to the presence and distribution of Douglas squirrels.