Woo I can answer this one. To be really sucsessful (yeah my spelling is great!) you need a higher ratio of males then females (so like 2.1 or 3.2 and so forth) The males will not fight, with most tree frogs, its the females that are territorial and will get pushier than the males.
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I think my frog owns a megaphone....
White's tree frogs : 1:1
Mantella viridis : 1:2

