Quote Originally Posted by Tadtholemew View Post
He's pretty big - I'd say a good 2+ inches long. I initially thought he might be a bullfrog, but he seems to be getting a leg bud on one side, and the creek he was in doesn't stay wet enough for him to be the year or more that a bullfrog would need.
I would think the size makes it not a bullfrog, and a green/bronze frog seems more likely? Check out this Guide to Tadpoles that gives typical sizes of tadpoles, and also has details on how to tell a few of the ranids apart by the shape of their mouths as some of them seem to be otherwise pretty much indistinguishable. There's also the USGS Patuxent Wildlife Research Center "Tadpoles of the United States and Canada: A Tutorial and Key" which has plenty of detail but is perhaps less user friendly.

You'll know soon enough in any case.