Normally the warty structures are all green. The paleness of this frog led me to wonder whether this species loses its colour while it is hibernating.
Or whether it is a chameleon and can change colour according to where it is. The piece of wood hiding it was more nearly the colour of the frog.
Or whether there's a wide range of markings and that this individual is this colour.
The fibrous bits on its back may be strands of the rope. I hope they're not parasites. Though they do remind me of the miniscule remora on some of the red tails (fish) in the pond nearby.