The translucent, pale color of this katydid won't last long. It has just molted, and the new exoskeleton is in the process of hardening and darkening. After an hour or so, the exoskeleton will be a darker, opaque green (much like the leaves in the photo) providing the perfect camo. (katydid is "Microcentrum rhombifolium", in the Orthoptera, family Tettigoniidae)
The night before the full moon, October 2017