Here is a video of tadpoles swimming in the first pond in its third month of existence.
I incorrectly identified these as tree frog tadpoles, which I now know to be smaller.
Based on countless observations over the past four years, I am fairly certain that the tadpoles in this video are those of the common Green Frog (Lithobates clamitans), the dominate amphibian species of most freshwater biomes in the U.S. and elsewhere.