One came through my yard last year around the same time. This was a very healthy-looking Florida box turtle. It took a rust underneath a large Sago in some wood chips.
The common box turtle (Terrapene carolina) is a species of box turtle with six existing subspecies. It is found throughout the eastern United States and Mexico. The box turtle has a distinctive hinged lowered shell (the box) that allows it to completely enclose itself. Its upper jaw is long and curved.