Cheri, thanks for the info and tips. It didn't occur to me that the more hiding places he has, the less he'll hide but I guess it make sense since he'll have a lot more things to jump on and climb on.
Frogs are small so they are always afraid of being eaten by predators. If he is surrounded by plants and leaves he won't feel like he has far to jump if he wants to hide. If he feels exposed he will hunker down and stop moving.