I *think* this may be an Agama atricollis, but I'm not sure. I aquired it a few days ago and they told me it was a "bulldog" lizard from Africa. It's mossy green with a dark spot on each side just above the shoulder. This morning I saw the throat was a deep royal blue whereas it wasn't before. I went to get my camera to photo the new color and it disappeared (the blue color). So, any thoughts as to the genus/species? I would appreciate any help. I think it may be arboreal.