Another visit to the Lower Huron Metropark today did not have any new species of dragonflies for me, but I found a couple of other things of note.
Obelisking male Blue Dasher (Pachydiplax longipennis)
From Field and Roadsides by Tom Whelen: Field guides call this upward pointing behavior obelisking, I suppose, because a tail pointing up looks like an [architectual-style] Egyptian obelisk. [For example, the Washington Monument is an obelisk.] The belief is that dragonflies do this to reduce the exposure of their abdomen to the sun. Dragonflies breathe through their abdomen. If you get a close look at a dragonfly through binoculars or a camera viewfinder you see the abdomen pulsing as they breathe.
A visit to Crosswinds Marsh earlier in the week gave me a chance for better photos of Slaty Skimmer (Libellula incesta).
Above and three below: The mating process for a pair of bluets. I wish the photos were better.
Face of male Widow Skimmer (Libellula luctuosa)
Immature male Eastern Pondhawk (Erythemis simplicicollis)
Above: Living up to his pondhawk name: Lunching on a bluet.