Next time you're out on a jog in Oregon make sure to keep your eyes up and have your hat attached to your head with a chin strap, otherwise you might have a role in an upcoming "CSI" whodunnit!

Here's why: Four runners have recently been attacked by a particularly aggressive owl. In one case, the owl landed on a runner's head, and in two other cases it made off with joggers' hats.

"I turned around and my favorite running hat was gone," owl victim Brad Hilliard to police. "It's one of those that has a Velcro strap. It had to have gotten right under that space and just lifted it of my head. I was just dumbfounded after the fact. I was like, 'My hat is gone and I can't see anything.'"

A "who's who" in the Audubon Society says that the owl could be aggressive because it's in mating season, or could be defending a nest.

Or it's just an angry bird.

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