Sioux Snaketail (Ophiogomphus smithi)
Photographed
pair in tandem

Twelve-spotted Skimmer (Libellula pulchella)
Observed
one male

White-faced Meadowhawk (Sympetrum obtrusum)
Photographed
two

Widow Skimmer (Libellula luctuosa)
Photographed
one male

Ebony Jewelwing (Calopteryx maculata)
Observed
many

River Jewelwing (Calopteryx aequabilis)
Observed
a few