Wildlife officials in Oregon say a mallard duck shot by a hunter near Eugene has tested positive for avian flu.
The strain of influenza is relatively common in Europe and Asia and has not caused any human sickness. The flu does not appear to cause illness in wild waterfowl, which have evolved with the virus. But it could kill falcons and hawks, as well as domesticated birds.
Oregon officials say they are not surprised this strain of avian flu has arrived in the state. Wild birds in Washington, California and Utah have also tested positive.