By location, date, and some field marks (shape of claspers on the dorsal view, rearward extension of the dorsal tip of the anterior thoracic side stripe, unmarked abdominal segment 10), I believe this should be a male shadow darner (Aeshna umbrosa). But I am troubled by some other field marks (anterior edge of the anterior thoracic side stripe is not straight, neither thoracic side stripe appears to be edged in black, apparent absence of a spur at the end of the clasper on the side view). (The tiny dew droplet could be obscuring a clasper spur, however.) Both images illustrate the same individual. They were made in a southern Wisconsin prairie near a sedge meadow and a small pond. I would appreciate it if the experts could weigh in on this and confirm the ID.