It might have seemed like the birds were fighting back against a Duluth, Minn., hunter on a recent trip to far northern Minnesota. Dan Erickson was walking back to his blind with a Canada goose slung over his shoulder when he was hit from behind and driven to his knees. A hungry peregrine falcon "came down and smacked him," hunting partner Bill Lord said.

Erickson dropped the goose and pointed his gun at the hovering falcon when Lord's 12-year-old son, Nate, noticed a bell on the falcon's back. He also noticed a piece of leather on the bird's foot.

It turned out it was a pet falcon that had escaped from its owner in Canada. So the group let the falcon feed on a pile of dead geese and eventually captured it with an empty packsack.