Species:

Kinosternon sonoriense

Sonora Mud Turtle

Subspecies I've seen:
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Sonoyta Mud Turtle
K. s. longifemorale
Subspecies:

Kinosternon sonoriense longifemorale

Sonoyta Mud Turtle

May 27, 2001
Quitobaquito Spring, Organ Pipe National Monument, Pima County, Arizona
Sonoyta Mud Turtle (Kinosternon sonoriense longifemorale)
Quitobaquito Spring is a rare oasis in the extremely dry southern Arizona desert. This highly endangered subspecies is only known to exist at Quitobaquito Spring and in Mexico just south of the spring.

We saw several turtle heads sticking out of the water, but this was the only turtle brave enough to leave the water while we were watching. It was a considerable distance away though, making for a somewhat scenic photo but not a very identifiable one. Fortunately, there's only one type of turtle at this location so identification was easy.