Monarchs Use Wind to Their Advantage

Karen Oberhauser is famous in the monarch world for her work on butterfly conservation. She says that there's a lot we don't know about monarch migration. But how they fly 2,000 miles in just a couple of months, that we do know. We'll leave the super generation soaring through the clouds above the U.S., morning sun on their left wing. Go to Mexico. It's the biggest royal butterfly reunion you've never been to.