I just went online to look for the answer to this question since I just saw this same insect today and I also don't know what it is. I do have dragonflies in my backyard and think this is a type. The body has a white stripe down the back.
What Type Of Flying Insect Has 4 Wings With A Brown/black "Flag" On Each Wing? Almost Looks Like A Bi-plane. Seems Similiar To A Dragonfly.
I'm looking for the answer to this question also. Saw one the other morning and was amazed!
I sure would like to know as well - I just saw one in my yard and it was gone before I could get a picture - you gave a perfect description because your question came up first in my search
It is called a Common Whitetail.