A summer of learning: Butterfly upperwings and underwings

My first “wow” butterfly moment in the summer of 2015, described in Butterflies Part I, was really about butterflies and moths, and their antennae. The second moment of amazement is this realization: One butterfly, and in fact each individual wing of that one butterfly, can be very different when seen from above or below. Their … More A summer of learning: Butterfly upperwings and underwings