The Glasswinged Butterfly; aka Greta oto is found abundantly in Mexico and Panama. The aka Greta oto has an unique characteristics of having transparent wings. Its Spanish name is “espejitos,” which means “little mirrors;” however, scientists have confirmed its wings to be transparent-glass instead of mirrors. The only function of these wings is to provide camouflage against predators. About 80% of the wing area is translucent while the rest 20% comprises of dark brown opaque borders.