enmarwen,
I have never actually seen a "mango" tree frog.. But there are tons of common names at there.. and alot of times a common name will be used to describe lots of different animals... so, with a common name, especially if there is doubt that it is correct, it is really hard to give care information.
That said, it is important to figure out what kind of animal you have, or at the very least, where it can be found in nature, so that you can provide the proper housing and conditions for it. Alot of frogs require very different conditions.. so you can not get a "blanket" caresheet that covers everything..
So.. that said, can you post a picture of your animal? It will be important that it is a clear, in focus picture with good lighting, and I may be able to help you identify your new pet.
You can also check out the cal photos site below, it has a very large selection of amphibians.. and you may be able to get a match there (I already checked for mango, it is not listed there either). There is a way to browse by photo on there too.. play with it, it may be helpful..
In the meantime.. I would make sure you kept your conditions on the "middle of the road" and hope for the best. about 70-75 degrees and about 70% humidity..
Time is of the essance here.. the wrong conditions can easily result in a lost pet..
And not to be an ass.. but next time find out what the animal is, and get a proper cage set up in advance.. you have a lot better chance of keeping a healthy happy pet that way.. Alot of animals are lost due to lack of knowledge of proper husbandry.. often 1 or 2 days of the wrong conditions is all it takes to cause enough stress to result in death. This is the biggest reason tree frogs have the rep of being difficult..
Anyways.. we need to figure out what you have and we can go from there..
CAL PHOTOS
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photos.xtremecombatsports.com