Yes it is ~ it take one to three years for them go through the nymph stages and their adult life is shorten by Autumn weather.
Check out this link:
http://www.dragonflydream.com/dragonfly.html
It was in October last year that I was in MO. The Dragonflies came around every day. One landed on a clothes pin and just looked at me for a few minutes. I was enchanted the entire time. One species of The Missouri Dragonfly is very unusual, it has a basket on the tail. They live in The Missouri swamp lands. Something like the Everglades. I think they are named Basket Tails.