Fawn Darner (Boyeria vinosa)
Observed
At least one - they're so quick it was hard to tell if there were multiple darners or just the one.

Black-shouldered Spinyleg (Dromogomphus spinosus)
Photographed
One male landed at my feet. There may have been several flying just beyond camera range.

Riverine Clubtail (Stylurus amnicola)
Photographed
One female

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

Twelve-spotted Skimmer (Libellula pulchella)
Observed
A couple.

Widow Skimmer (Libellula luctuosa)
Observed
A couple.

Ebony Jewelwing (Calopteryx maculata)
Observed
A few

Blue-tipped Dancer (Argia tibialis)
Observed
One female

Powdered Dancer (Argia moesta)
Observed
A few