I've had my whites tree frog for about 1 year now, hes recently been put in a new tank and hes doing well, he is healthy and still eats alot. So i'm not concerned; but just last week he started to sleep on the glass in the tank and I thought it was strange. He has been sleeping on the glass in the same spot every day all day until he wakes up. He has been in his new tank for 2 months, and he has slept inside of a fake plastic log since i got him which he still has. Does anyone know why he would so suddenly decide to sleep in a completely different spot? Especially on the glass?