The biological clocks of some species seem to be ticking as the summer winds down, compelling them into frantically mating sessions, like this pair of Halloween Pennant dragonflies (Celithemis eponina) that I spotted this past weekend at Lilypons Water Gardens in Adamstown, Maryland. The challenge in photographing this type of activity is to present it in a way that is artistic rather than purely sexual.
© Michael Q. Powell. All rights reserved
Mike Powell 
So elegant and acrobatic in the way they mate. Their wings are completely beautiful.