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Plestiodon laticeps
This spotting was about 6" long, mostly brown with some striping, and a reddish head.
This skink came from a crack between the house and the deck. It would sun itself, but retreat through the crack if it felt threatened (if I got too close). The house sits on mostly farmland--there are other houses around, but not very close. The deck is shaded by tulip poplar trees.
I saw this skink sunning itself on the deck of the house where I work. I took the pictures through the sliding glass door. If I got too close to the glass, the skink would retreat through the crack it came from.
I love that you caught it yawning in the last picture :D btw I agree with Lisa that it's a Broad-head Skink.
This is certainly a skink. There are a number of Tennessee skinks. See http://tinyurl.com/n5v5mwa for more information, provided this is a wild animal and not captive.