This female is not yet fully mature, as can be seen by the dark eyes and muted colors. I have also seen R. mutata take cover on trees on shrubs when it has started to rain, as well as a sort of siesta when it has been hot and sunny. Mostly though, one sees them "perch" when they are still maturing. The wings have a slight amber tinge at that stage as well.
After I was finished at the Nan Weston Preserve, I decided to continue down Easudes Road into Jackson County and collected in the Sharonville State Wildlife Management Area (you can always tell when you are in a State Game Area, because so many morons think signs are wildlife). As I crossed one four-corners, I saw dozens more R. mutata flying in the roadway in what appeared to be feeding swarms. In one opening at the edge of a field I saw dozens more feeding, and some were perched on shrubs. One perched male looked like he had emerged within a few hours. As I drove along towards Tamarack Lake, I saw more darners flying along the road. I parked at the Tamarack Lake site, and took the trail down to the lake. In the field edges, I saw more R. mutata. This has to have been an epic emergence of Spatterdock darners. I also saw a bunch of Libellula cyanea at Tamarack Lake -- a very pretty skimmer with black and white stigmas. Spangled skimmers are not everywhere, but mucky-bottomed lakes with shallow margins seem to be a good place to look.
After I got home from my trip, I spent some time in the front yard, and what did I see? An immature Spatterdock Darner on the tree in front of the house! I watcher her for some time, and I wonder where she emerged from. All told, I would estimate that I saw close to a hundred darners yesterday, so there would have been may thousands out there that I did not see, which really boggles my mind. It truly was a darner day.