Oklahoma's first discovered population of blackcapped vireos was in Blaine County in 1901, but the advancement of eastern Red Cedar trees in their canyon homes had pushed them out of the county by 1980. To help the then-endangered bird the Wildlife Department teamed up with the Oklahoma Nature Conservancy and U.S. Fish and Wildlife Service to cut cedars from the property. More than 14 years later, we're still seeing the benefits. The Oklahoma Biological Survey heard at least 41 territorial males singing in the restored canyons last spring. Five of those males had been captured and banded in the area during a 2017 study.