WE CAUGHT A FROG!!! How do we keep it alive??

[UncleChester]

..And it's not like we were looking to find a pet frog--why would we have done any research on it without having the consideration of getting a frog?

Because the responsible thing to do would be to know what you are doing before taking on the care of another living thing?

Anyhoo, since there is no care sheet for your frog on this site, you should give the excellent Frog Forum - Gray Tree Frog Care and Breeding a read. Your Hyla cinerea can be found in the same habitats as H. versicolor and H. chrysoscelis (in their southern areas at least), and the care requirements are pretty much the same.

Also, what's the fun in wasting money to buy one when you can catch one for free?

If you aren't willing to shell out the $5-$10 for a Hyla cinerea to keep as a pet, than I don't really know what to say. On the other hand, that $5-$10 Hyla cinerea from the petstore will probably have been wild caught (I may be mistaken but I don't believe anyone breeds them for commercial purposes), so it wouldn't be much different.

Green tree frogs can be $20 to around $40 in Australia.

Are you referring to Litoria caerulea or Hyla cinerea?

I wish people could stop saying "Green Treefrog" as it is used to refer to (at least) three different species- the Australian Green Treefog, aka Litoria caerulea, the American Green Treefrog, aka ​Hyla cinerea, and in my local area (within a 2' radius of me) the much rarer Christmas Green Treefog, ​Rana clamitans (see attached photo). This is an international forum here folks.