DistributionRead full entry
Global Range: (5000-200,000 square km (about 2000-80,000 square miles)) Range is confined to the Harney Basin, Oregon (Page and Burr 2011). In addition to Harney Basin, Markle and Hill (2000) included the following areas in the range: Snake River basin, including Malheur River, Oregon and Idaho; lower Columbia basin (e.g., upper Willamette River system [but evidently mostly hybrids with C. hubbsi]; Gales Creek and Clatskanie River, Oregon); probably upper Columbia basin in Washington, southern British Columbia, and possibly other areas. Markle and Hill (2000) stated that further taxonomic study is needed.
Due to uncertainties in the distributional details of members of the Cottus bairdii complex, the watershed (HUC) map in NatureServe Explorer depicts the distribution of the complex, including Cottus bairdii and species now recognized as Cottus bendirei and Cottus hubbsi. The ranges of individual species will be mapped separately when further information becomes available.