Great! I also wanted to do a chameleon realistic drawing but I haven't had the time to do it yet Great wock on the colors and good backround. I like that you use different brushes - the spotted one to get texture.
you show a bit more of the body but else it think it is the essence of the chameleon. (and you got all 4 legs - i just discovered I forgot the back one under the body ) I hope you had a bit fun doing it!