Harlequin Darner (Gomphaeschna furcillata)
Photographed
Dozens of them! Some perched on road, some flying, some even landed on me to sun and eat bugs. Also had at least 2 pairs in wheel.

Dusky Clubtail (Phanogomphus spicatus)
Observed

Skillet Clubtail (Gomphurus ventricosus)
Photographed
Just one - seemed out of place

Twin-spotted Spiketail (Cordulegaster maculata)
Observed

Swift River Cruiser (Illinois River Cruiser ssp.) (Macromia illinoiensis illinoiensis)
Photographed

Forcipate Emerald (Somatochlora forcipata)
Photographed
1-2, photos available if desired

Prince Baskettail (Epitheca princeps)
Observed

Racket-tailed Emerald (Dorocordulia libera)
Observed

Belted Whiteface (Leucorrhinia proxima)
Observed

Common Whitetail (Plathemis lydia)
Observed

Four-spotted Skimmer (Libellula quadrimaculata)
Observed

Frosted Whiteface (Leucorrhinia frigida)
Observed

Hudsonian Whiteface (Leucorrhinia hudsonica)
Observed

Twelve-spotted Skimmer (Libellula pulchella)
Observed