Thanks for the feedback all. I feel a little better knowing this is not atypical behavior.
The first picture below is when he first arrived. The second picture is from a couple weeks ago. He definitely uses the rocks to hide and use as camo when he's mottled.
The first picture below is when he first arrived. The second picture is from a couple weeks ago. He definitely uses the rocks to hide and use as camo when he's mottled.