Skimmer

Photo by Ned Harris 8/3/2014

Click on the photo for a larger view of this male Filagree Skimmer dragonfly. And remember this handy general rule for the insect world: If it has wings, it's an adult. (Not all adult insects have wings - take ants, for example - but if there are wings, then you are looking at an adult.)
Like many animals, dragonflies are often sexually dimorphic (di- = 2; morph- = form; two forms) as adults. In this species, the males have much darker, more filled-in wings than females. Scroll down on the link above to compare.
And, if you like dragonflies, spend some time at AZDragonfly.net. Truly stunning photographs.