This is probably a Carolina Anole, due to the bright green color. They have the ability to change to a duller green or brown, depending on the temperature and their environment.
This one is shedding his skin, which is brought on by growth: like other reptiles their skin doesn’t grow with them.
Anoles become less active when going through the shedding process and this one picked a dangerous spot at the edge of the swamp to just hang out. He would easily be seen by a passing bird who could snatch him up for lunch. I left before that happened.