I actually found a third gray tree frog tonight to add to my male and females. I love them they're such good insect hunters and while they're typically completely freaked out at first once you get them used to their cage you can just take the top off and play with them while the other ones just relax on the lip of the cage. Plus they feel so cool walking across your hands with their cups. Their call is pretty cute too. Once I find a camera I'll have to start posting some pictures of them. But at night they're really good hunters. I usually go outside and pick up some huge moths and put them in their cage and when I turn off the lights you can hear all 3 just flying around the cage.