Great photos, Jack! Just read something interesting about butterflies using UV light as a signal in mating. Here's a paragraph from Wiki on cabbage whites, in case others have not seen it:
"Drawings of the White Cabbage Butterfly representing the butterfly under UV light and the visible region of light.
White Cabbage Butterflies, Pieris rapae crucivora, use their private ultraviolet communication system to initiate mating behavior. In this species, ultraviolet reflection is sexually dimorphic with females exhibiting the ability to reflect ultraviolet light of 380 nm to 400 nm and males being less able to reflect UV. Males who perceive an ultraviolet reflection from a female initiate a courtship behavior that involves approaching the female and attempting to copulate. Females communicate their receptivity to males using their ultraviolet communication system. The ultraviolet reflection is thought to be concentrated to the ventral side of a female’s hind wing."
So maybe the lady Cabbage White was flashing him some UV rays when she lifted her wings?
