Last Saturday morning in nearby Seneca Creek State Park a fallen tree provided a sunning platform for a group of turtles. It looked like they were representing several generations.
They appear to be red-eared sliders (Trachemys scripta elegans). Note the red patch behind the eye of the large turtle in the front.
Many of the partially submerged logs in Lake Clopper had turtles on them. Some of the turtles were surprisingly tolerant of me, and as you can see in the picture below, even let me get on the same log they were on. Unfortunately, I didn't have a longer lens with me.
Yours truly photographing another bunch of turtles (is there a specific name for a group of turtles?). Photo by Hopededik.