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BULLFROGS

Most wild bullfrogs are escapees from frog farms.

QUAGGA MUSSELS

These tiny mussels don't have legs, but they're excellent hitchhikers and your boat might be their next ride.

ASIAN FLYING CARP

You won’t need a rod and reel for these fish, but Asian Flying Carp are an ongoing threat, not a good day's catch.

YELLOW STAR THISTLE

This stuff is toxic to cattle, useless to wildlife, and is taking over ranches.

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© 2014 Oregon Public Broadcasting.