I sometimes let my white's explore the house. (keeping a close eye on him) Sometimes he stays in one spot and other times he jumps all the way across the room in a few seconds. In generally however he seems to have a theme of liking dark tight spaces.

These spaces can include (but are not limited to) under the table, on the book shelf hiding between a book and the shelf, under random furniture (such as chairs and couches),under my binder or any other tent-like objects sitting on the table, inside the couch/under the cushions (learned not to sit on the couch while holding a curious frog) and most dangerously inside the filtration inside the refrigerator. (What is with my frog and filtration?! I pulled him out before he could hurt himself/get far and have vowed to keep him away from any air ducts/filtration devices from now on.)

Also, if you have a cricket cage nearby they might go near that. Mine likes to sit outside the glass and stare in at the insects. So remember. Any place that is: Dark, tight, made of wood, or made of glass could be a potential hiding place. Good luck with the search. I hope you find him safe and sound.