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Conservation Assessment for Harlequin Duck

The goal of the Conservation Assessment is to summarize existing information regarding the biology and ecology of the Harlequin Duck (Histrionicus histrionicus), threats to the species, and management considerations, and to provide information to land managers to assist in the formulation of options for management activities. This species is of concern in Oregon and Washington due to potentially declining populations in western North America, narrow breeding habitat requirements, increasing human disturbance at breeding and wintering sites, and a lack of information regarding threats, causes of declines, factors limiting population size, and basic demographic information in the Oregon and Washington portion of its range. There is regional concern that western Harlequin Ducks may be in jeopardy, but there are insufficient data to support federal listing at this time. Federal management for this species follows Forest Service (FS) Region 6 Sensitive Species (SS) and/or Oregon/Washington (OR/WA) BLM Special Status Species (SSS) policies.

The Conservation Assessment document can be searched for and found on the Interagency Species Status/Sensitive Species Program.

Conservation Assessment for Great Grey Owl

Great Grey OwlThe 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.

The Conservation Assessment document can be searched for and found on the Interagency Species Status/Sensitive Species Program.

Conservation Assessment for Purple Martin

The goal of the conservation assessment is to summarize existing information regarding the biology and ecology of the western Purple Martin (Progne subis arboricola), threats to the species, and management considerations, and to provide information to land managers to assist in the formulation of options for management activities. This species remains abundant in the eastern part of its range, but the western subspecies is of concern in Oregon and Washington due to its narrow range, small population size, reductions in available habitat and cavity nesting sites, competition for remaining cavities from non-native bird species (especially European Starlings [Sturnus vulgaris]), and possibly increases in habitat loss on Brazilian wintering grounds and agricultural insecticide use during all portions of the annual cycle. Federal management for this species follows Forest Service (FS) Region 6 Sensitive Species (SS) and/or Oregon/Washington (OR/WA) BLM Special Status Species (SSS) policies.

You can search for the Conservation Assessment for the Purple Martin on the Interagency Special Status/Sensitive Species Program.