Absolutely fascinating, Mother Nature literally understands math....
Went out hoping to fish the Monocacy river last night with my younger son, water level was ok but the water was like the color of chocolate milk and no sign of cicadas. For some reason they aren't around north of Frederick....
I'm going to try and hit the Gunpowder River in the next few weeks which is about 20 minutes north of Bawlmer....glad to hear they are there....