Not only are these frogs very interesting in their biology, but they are one of the first species that scientists are attempting to restore from near extinction via cloning technology.
These interesting frogs apparently, swallow their eggs and stop digestion so that the tadpoles can develop and be birthed/regurgitated after hatching. (Scifi friends, take this to the next level and you have an amphibian method of gestation similar to that of mammals, which of course led to sapience). Keep reading!
Scientists are trying to clone the frogs and restore them to the wild after they have disappeared from the wild, likely due to habitat destruction. From what I read, it sounds like they’ve got the basics cloning down, but have not yet been able to get viable tadpoles. The problem could be with the cloning techniques themselves, biology has a way of making simple ideas complicated, or it could be that it is the incubation and proper treatment of the developing eggs is the problem. Either way they sound confident that they will overcome and expand the frog population once again.