Most of the dragonflies up here in Minnesota are gone. Our cold nights have for the most part finished off the season. That is not true everywhere in the U.S. however. Yesterday while a football game between Miami and Kansas State was postponed due to a storm, Sun Life Stadium, where they were playing, was invaded by a cloud of dragonflies. If you would like to read more here is a link.
It was hard to tell exactly what type of dragon that they were from the pictures that were provided but they appeared to be a member of the darner family. The Canada darner, pictured above, is one of the most common darners that we see around here. In the second photo the darners are mating. Shortly after the picture was taken she flew off back to the water to lay her eggs.