Texas Cooter vs. Pond Slider

They bask side by side on every central Texas river and pond. A: Broad yellow bars; no red in the Texas Cooter; a red (or yellow) patch behind the eye in the Pond Slider. B: Yellow whorls and rings on each plate in the Texas Cooter; yellow bars or lines on each plate in the Pond Slider. Old male sliders turn dark and lose the red patch; look for the slider's rounded lower jaw and the Texas Cooter's notched upper jaw.

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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