The ponds at Yalobusha farms produce many tadpoles, especially Green Frogs (Lithobates clamitans) and Cope’s Gray Tree Frogs (Hyla chrysoscelis) and the Eastern Narrow-mouthed Toad (Gastrophryne carolinensis).
The ponds are also host to many larvae of the blue dasher dragonflies (Pachydiplax longipennis), which swarm over the katniss and chase each other around the ponds.
BUT, the creature in the ponds that seem to have the most intense ecological impact are the Mosquitofish (Gambusia affinis), which are voracious eaters of mosquito larvae.
In fact, there aren’t any mosquito larvae found in the ponds because Mosquitofish reproduce to fill all available space and consume the floating egg cases as soon as they are laid, often while they are being laid, along with the female mosquito.
For ten years before the ponds were dug, the back yard was plain St. Augustine grass and swarmed with Asian tiger mosquitoes no matter how dry or how rainy the year had been.
Now that the ponds are there, mosquitos are sparse.
Here is a video of fish swimming in the first pond: