The Common White Tail dragonfly, also known as the Longtail Skimmer, plathemis lydia, can be found from the East Coast of North America all the way to the West. I posted about other dragonflies before. The Common Whitetail and August Meadowhawk are from the same Libellulidae family, although the whitetail is at least three times the size, one of the largest in the family. Some classify the Common Whitetail in the genus libellula, but others contend that it is a separate genus and should be classified as genus plathemis.
Check out those cool wing patterns!