I have tads and just-morphed froglets of these I caught in a small pond and a pool in South Miami. Roughly 50 miles south, in Key Largo, I found the same species (the one below), and this one must be at least a year old. The pictures are fuzzy because I took them in fairly dark surroundings, but this frog doesn't look like anything I can find information of, and is probably not rare.
Anyway, the froglets and this adult look very much alike. There are no differences that I can see, except that some have dots on their back, which are arranged like dots on a dice, not recklessly. The eyes are a bronzish-red and the pupils are horizontal. On the underside, they have an aqua-bluish tint to the skin of the belly and legs. The face is masked and there is a single white-ish line carried through which is under the mask. I'm trying to provide the best discription, so some of this may seem obvious or irrelevant! Anyway, the skin is mostly smooth, although there are small bumps on the back. The spotted ones have the dots on these bumps. The tadpoles are relatively small as are the froglets, and have their dots (if they end up dotted) and the red eyes well before fully morphing. There are faint bands on the legs, but no markings on the backside/inside of the thighs. I haven't seen the froglets change colors, but the adult here turns to a dark brown when hidden on its Bed-A-Beast in the shadows (I have never seen it any shade of olive or green). Usually, they're a silvery brown, and the skin looks slightly see-through. The snout is rounded, not pointy, and this frog is very agile! It jumps very far for such a small size, but is relatively calm. The little froglets are very active.
I found this one in the picture late at night sitting on the edge of a pot holding a large bromeliad. The only other frogs I found near there were three Cuban tree frogs by a pond, and some greenhouse frogs. The Cubans and the unknown here were very close to the shorline, 50 feet, so I'd guess this species has some salt tolerance. I'm thinking it might be a species of coqui, but none I've found looks similar enough to this. It hasn't called, to the best of my knowledge. It doesn't look quite like any species I've seen pictures of that lives in Florida, either.
Thanks for your help, and sorry about the quality of the photos. Hope you like them, either way 







Heather