Whats with the name, they are
green aren't they?
In the case of Litoria Caerulea, the White's tree frog, the name entails not the color, but the name of the man who first described them. This of course, is after the Australian aboriginal peoples knew of them and named them. In Australia, they are know as the Green Tree Frog. That common name isn't used in the U.S because we have our own native species already called the Green Tree Frog (Hyla Cinerea). The latin name Caerulea, refers to the blue pigment in the original preserved specimens.
Man, are they supposed to be
How fat? They shouldn't be morbidly obese, but yes, they are.... well... fluffy :)
Is my frog yawning?
No its part of the molting (shedding) process. Yawning, swelling up and dragging their arms over their head.
Do they need friends?
Nope. Sort of like cats, solitary and independent of other entities. No need for a cagemate.
What else can I put in there?
Nothing. Never mix frog species. This has long been proven time and again to kill animals. Please be safe, and don't mix.