I know for an absolute fact that they are bull frog tad poles.
They jump out really quick and look like a thumb just sticking out of the water or a head of a turtle.
You my friend have hundreds of bull frog tad poles. I have seen this in a small pond and they will seem like they are jumping together as a group.
Cheers Don.
We definitely have bull frogs, that deeps base sound right now is loud this time of year.