Monarch Butterflies Stock Photography

The monarch butterfly (Danaus plexippus). Taken in the the Rosario sanctuaiy of the Mariposa Monarca Biosphere Reserve in Mexico. The butterflies migrate there to overwinter in Mexico at the end of their migration. They mass on the trees in the forest and fly when they warm up in the sun. This is the fourth or fifth generation. When they fly together you can hear their wings.