This is a male pearl crescent, Phyciodes tharos.
Butterflies are insects, and insects have six legs, right? But this one only seems to have four.
Pearl crescents belong to a family of butterflies, Nymphalidae or nymphalids. The group is also referred to as “brushfoot butterflies.” The front pair of legs in this family is greatly reduced in size and the hairs remind some people of brushes.
The right leg can be seen just below the eye.
See it now? Not much good for walking.