I dont know about the chameleons? But in the keys and south fl theres alot of iguanas. I love reptiles but when we go to a friends summer house in the keys she asks me to bring my rifle with me because there is so many and they can be really agressive. You also have your alligators and there are burms in the glades. When A Florida fish and wildlife guide took us out on a airboat we did spot a 5ft burmese python he had to kill.