Gray/Cope's Gray Tree Frog (Female and Juvenile)

I am not sure if these are Cope's gray tree frogs or Gray tree frogs, but I think that the small, green one is a juvenile, and the larger, gray one is a female.

Cope's Gray Tree Frog is almost indistinguishable from the Gray Tree Frog, and shares much of its geographic range. Both species can vary in color from gray to green because of their amazing ability to camouflage - they can slowly change color from black to nearly white. The amount of mottling is variable. The only noticeable difference between the two species is their call — Cope's has a faster-paced and slightly higher-pitched call than the Gray Tree Frog.