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Graptemys geographica
Basking space was at a premium that day due to recent rain most of the logs were submerged, forcing these four turtles to share.
Chickamauga Creek
Wow, that is extreme dimorphism, I was only aware of insects taking it to that extreme.
I think they are all Northern Map Turtles. Some of the species in the Graptemys genus exhibit extreme sexual dimorphism. So in this picture the big turtles are the females and the smaller one there is an adult male (they also have a more pronounced ridge going down the back of the carapace).
I thought I might have more than one species here, I will split if that is the case, can you tell if they are all Northern Map Turtles?
Spotted on Sep 19, 2012
Submitted on Oct 7, 2012
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