They tend to come out on the surface more frequently in the late summer and fall. Arboreal species These snakes can be found on the ground at times, but spend much of their time high in the trees. The yellow rat snake, Elaphe obsoleta quadrivittata, can reach over 6' in length. They are most frequently found in mesic and hydric hammocks, and are also frequently seen along the entrance road near the main parking lot. Smaller individuals are sometimes found far from hammock out on the dikes.
Juveniles look quite different from the adults.
This one is in defensive mode, and will strike viciously and repeatedly if given the chance. There's no mistaking the rough green snake, Opheodrys aestivalis. Probably fairly common in mesic and hydric hammock habitats, they are not often seen because of their camouflaging color pattern, slow movement, and arboreal habits. I see several of these snakes dead on the road close to the parking lot each year, so I suspect they are quite abundant. They feed mainly on insects.