Not going on the actually photo Lynn, nor how the animal looks (however this does add more weight to the theory). I'm basing the evaluation on the boldness and routine this cryptic callidryas in particular portrays. Though it has not yet been widely documented, female Phyllomedusid will often seek refuge and become dormant in a preferred situe irrelevant of the sub-family and genus (this applies to all* Neobatrachia classification). Males on the other hand trawl, relocating themselves as part of the communal group.

Thomas, covering what has already been said here - you may want to look at introducing more foliage and plant cover towards the canopy top. These can consist of but not limited to Scindapsus pictus (Pothos) and Scindapsus pictus argyraeus (Silver Pothos) and will help greatly with the solar re-creation which can be used as part of the 'light and shade method'. This will enable you to set a photo-gradient and allow your callidryas proper production and use of the D3 cycle.

''To offer your frogs the choice makes great practise in captivity as a whole''