(Salem, OR) -- Close to one-million birds have been euthanized in Oregon after avian flu was detected in two commercial poultry operations and two backyard flocks earlier this month. The Oregon Department of Agriculture says a total of 790-thousand birds were put down. The Department reports the commercial operations are in Linn and Marion counties. The backyard flocks are in Deschutes and Marion counties. Quarantines were placed around the commercial operations to make sure no additional cases are detected.