I know I've got to catch it (and the others). I did get one out by the pool a couple of weeks ago. Scooped it into a plastic bag - put a drop or two of Ambisol on its head (supposedly it numbs the creature) and put it in my outside freezer -- where it went peacefully to sleep. Three days later it went out with the trash. I do know that a good way to identify is: catch it (a net always works); hold it (but if in your hand holdit away because they pee a lot) or through the net, touch the top of its head. Move the skin. If it does move, it's a good frog; if it's fused -- it's a Cuban frog.
This is posted on one of the University of Florida bulletins. Easy to look up.
Seriously, we (Master Gardeners in the state of Florida) have been asked to document and do as much research on them as we can if we find them in our yards, and then send it back to the University. They have become a serious threat and creating a massive imbalance with our native species -- apart from eating baby birds !