@SusScrofa Thank you! The reddish streak is so dull that I didn't notice it! You're right that the turtle on the right looks like an adult female Red-eared Slider (Trachemys scripta elegans). The male on the left looks different and I wonder if it's a Yellow-bellied Slider (Trachemys scripta scripta). The yellow stripes on his neck are a very different pattern, and there is a yellow blotch behind the eye. The Yellow-bellied Slider is the subspecies that is native to Georgia, but there is an intergrade zone between the two subspecies in Alabama and western Georgia, so we may be dealing with some subspecific introgression. Either way, these definitely aren't River Cooters. I was confusing the rear-facing yellow "C" pattern of the marginal scutes of these sliders with the rear-facing yellow "C" of the costal scutes of River Cooters! My mistake.
@Summer Tanager I'm pretty certain the left one is Pseudemys concinna or at least one of species in the P. concinna complex . It was signed as P. concinna as well. While there were Yellow-bellied Sliders here, the left turtle lacks the thick yellow 'S' stripe behind the ear so Im pretty confident that rules it out.
