Flying Monarchs
Go outside, lie down on your back, and simply look up at the sky! You'll know a migrating monarch if you see one that seems to be flying with a purpose, and traveling in one direction. This is called "directional flight." You may see only one butterfly, but it's a thrill when you see that it's traveling toward Mexico.

"Every monarch was traveling in the same direction, as if they were following a road in the sky!" wrote an observer from New York.

Photo: Elizabeth Howard