This is a green anole, similar to the brown anoles in the photos below. You can tell the difference between a male and female anole because a male has a flap of skin under the throat called a dewlap. (This dewlap is used to attract females.)
These are brown anoles. I put sticks and branches in our treehouse to make a lizard playground. We have lots of these in our yard, so they are easy to find.