We found out in Mexico, butterflies only fly when the sun is out. They have special solar cells on their wings that are receptive to the sun. The day Dale and Della went to the sanctuary the millions of butterflies hung from the trees- not flying, and you could see the duller side of the wings - it was a cloudy day.
They were camouflaged and almost looked like leaves on the trees. A teacher friend, Mary went on a sunny day, two weeks later ,and saw the orange side of the monarch wings because they flew. Mary said the sensation of seeing so many butterlies fly at once was awesome.
Return to the Giant Flower Island.