Apart from the well-known green darner, Anax junius, the species of Aeshna are the most familiar Minnesota Aeshnidae. These species are remarkably uniform in appearance. The basic body color is brown with blue, green, or yellow stripes on the thorax and with marks of similar color on the abdomen. Usually the spots of male specimens are blue, whereas green of various shades appears on most females. The individual species are not readily discernible to the novice collector.
Boole, Marilee S.; Hamrum, Charles L.; and Anderson, Myron A.
"The Minnesota Species of Aeshna with Notes on their Habits and Distribution (Odonata: Aeshnidae),"
The Great Lakes Entomologist, vol 7
Available at: https://scholar.valpo.edu/tgle/vol7/iss1/5