I was just casually walking through Monmouth Battlefield State Park and I heard what sounded like screaming, moving very rapidly through the woods back and forth. At first I thought it was some strange bird mating call but it was moving too fast. I then figured it could be motorcycles in the distance but it sounded way too high pitched and was too frequent. It kept traveling back and forth through large distances in the woods, and the sound itself was layering, almost as if there were multiple sources, or communication back and forth. I thought that there must be someone else who heard it too and so I approached the security officer at the park and he was hearing it as well! He thought it might be drones. It seems likely to me but we couldn’t actually see anything. Anyway, I figured I would share this strange story because maybe someone else heard it and can confirm what it was.