Alabama Red-bellied Cooter vs. River Cooter

Both big cooters bask together in the bayous of the lower Pascagoula and Back Bay of Biloxi. A: Red to orange upright bars in the Alabama Red-bellied Cooter; a pale C-shaped mark on the second side plate in the River Cooter. B: Red-orange to pale yellow, little marked in the Alabama Red-bellied Cooter; yellow with dark marks along the seams in the River Cooter. C: A few broad yellow stripes in the Alabama Red-bellied Cooter; many thin yellow stripes in the River Cooter. The Alabama Red-bellied Cooter has a notch at the tip of the upper jaw with a tooth-like point on each side (no open photo shows it clearly); the River Cooter's jaw edge is smooth.

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

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