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Danaus plexippus
Beautiful Orange, tan, white and black butterfly
The Wings of Wonder beneficial insect garden within Mary Margaret's Garden, Fayette Academy's outdoor classroom.
I am not sure about this one. I checked Monarch and Viceroy but it is not an exact match.
I agree with Karen, this is a Monarch for sure. Here is a link: http://bugguide.net/node/view/540