I've got seed shrimp! You can also see detritus worms in this video.
I have in past years seen standing water in the woods at a local national rec area and on at least one occasion I have seen daphnia there. A couple or three weeks ago, I stopped by to collect leaf litter from that spot for my aquarium. It was dry at the time, but it was clearly a seasonal beaver situation.
I had hoped to pick up some invertebrate eggs, and it looks like it has paid off.

