This lovely butterfly is enjoying a meal thanks to a camphor daisy, one of the many volunteer flowers in our monarch waystation.  We can tell this one is a male since the back wings are missing the striping on the edge of the wings.  The females have the marks along the outside edges of both the front and back wings, and young, healthy females are partially ultraviolet reflective to attract mates.   The checkered white butterfly needs to raise its body temperature to around 90 degrees in order to fly.  You will often seen them sunning themselves, using their reflective white wings to direct the heat from the sun to warm their bodies in preparation for flight.