Hey Bob -
Are you asking about care for the WC frog he has? or for something he wants to get?
There are alot of different treefrogs, and many of them need different care. So, to set a tank up correctly, you will need to have a species in mind (or atleast a region.. tropical, woodland, a dry/rocky areas etc.. ).
As for buying them, again, sort of depends on what your friend is looking for. Some species can be pretty hardy and WC animals are ok (green tree frogs, gray treefrogs, copes, whites, etc.. ) while others do not import well (most of the tropical species) and should be bought as CB from a breeder.
So, if your friend can narrow it down a bit, I can help with care and where to get one.
>>1-where to buy from?
Depends on the species..
>>2-can multiple species live together (red-eye and the other eye lol)
again, sort of depends on the species. Many tree frogs require different care - for example if you put an indian sand boa in a tank with a brb, one of them would have issues because of the husbandry. Same w/ frogs. The second problem you will encounter mixing species, many frogs will eat frogs. So, if there is a size difference, the smaller will become dinner. The third problem, cross breeding, and the ethical issues there. So, in short, yes, you can mix them, but you have to be careful on how you do it, and which species you use.
>>3-what size vivarium is a must for multiple say 5?
again, which species? 5 clown tree frogs or Phyllomedusa hypochondrialis can live in a 29gallon with no problem, 5 Phyllomedusa bicolor would be crowded in a 110xtra high. With treefrogs, taller is always better...
>>4-how to set up an easy temp gradient for them (I don't know their temps needed though but he should at least) but how do you supply a little warmth without the dry heat and he does have a piece of glass over the tank right now
again, varies greatly with species. Treefrogs will range from needing mild and humidity climate (75degrees and 80% humidity) to warm and dry (95 degrees and 50% humidity). It really depends on the species. Most tree frogs don't need a gradient though. There are a few of Phyllomedusa species that bask - but for the most part, constant temps are fine. For my frog vivs, I usually don't heat them at all, but most of the species I work with do fine in the 75degree range. I use lights for plants only, and if they create heat, I support them above the tank so it doesn't heat the tank to much.
Anyway, let me know what type of frog it is, and I can get you specific care for it. If he found it in the wild though, odds are the care sheet for a green tree frog here would provide the correct conditions.
amphibiancare.com/frogs/caresheets/greentreefrog.html
If you are having trouble getting an id on the frog, get me a pic if you can. If not, let me know what part of the US it was found in. There aren't a lot of treefrogs in the US, so it shouldn't be hard to ID.
>>
>>thanks
>>Bob
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