Feeding on white eupatorium flowers. I first noticed the bright blue of this butterfly in flight, so different from other local hairstreaks. The telltale white spot and white “M” were faded but the hind wing red spot was set in from the edge of the hindwing which is also a fieldmark of this species.
Here is a fresher White M Hairstreak photographed on September 15, 2012, also at Gateway Business Park. It also was feeding on white eupatorium flowers which seem to be a favorite nectar source for this species here in September. The white “M” and white spot on the leading edge of the hind wing are clearly visible on this butterfly.