Guys take a look at the European Green Frog Complex the Edible frog is a hybrid of the marsh frog and pool frogs. Bombinas' ie Orientalis, the yellow bellied toad and european firebellied toads all cross or hybridize where their ranges overlap with fertile offspring in nature. But if by doing this the husbandry off the tree-frogs is better understood, and it leads to better captive breeding and survival of endangered animals then it should be applauded.