I need help identifying a lizard that is roaming in my yard?

Question:It is approximately 6" long, has a red triangular shaped head the body is a light green and smooth in appearance, any help is appreciated

Answers:
Is it a red-headed agama?

http://www.the-lizard-lounge.com/content...

You don't give any geographic specifics, so it's hard to tell you because some lizards live in different climates.