Gray's are just too cute!! I am real new at this, but mine seem to have a go to color. Is this true? Do they have a normal color that they just are, then depending on enviroment, change, then back to their "default" color when they move? 1 more ??? One of the larger froglets was hanging on the back of the tank that's covered with a typical pet store frog/reptile landscape pic. After being there for a bit he/she actually changed 2 colors green and brown matching the background colors perfectly, Is this how they operate or do they normally change just one color?? Just has me curious.