The goal of this Conservation Assessment is to summarize existing information regarding the biology and ecology of the Great Gray Owl (Strix nebulosa), threats to the species, and management considerations, and to provide information to land managers to assist in the formulation of options for management activities. The species is of concern in Washington due to the low number of observations and limited information on breeding pairs. Source habitat for this species appears to have undergone significant losses in quality/function in large areas of Washington state.