The Sage Thrasher (Oreoscoptes montanus) breeds regularly in Canada only in the south Okanagan and Similkameen valleys of British Columbia. Sightings in the last 20 years have come from only four sites in this area, and from only one site in the last decade. Historical populations (pre-1920) may have been as high as 30 pairs, but since 1980, only 5 to 10 pairs have been present. The Sage Thrasher is essentially dependent on sagebrush habitat during the breeding season, and range management practices such as mowing, burning, and herbicide treatments have reduced the quantity and quality of this habitat. Residential and agricultural developments have also destroyed habitat and further threaten the remaining breeding sites. The Sage Thrasher should be considered an Endangered species in British Columbia.
Cannings, R.J.. 1995. Status of the Sage Thrasher in British Columbia. Ministry of Environment, Lands and Parks. Species Status Report. B79