It was the calm before the storm. The pond was the calm, sheer and smooth. The bus that was due with over 100 middle school students for a field trip was the impending storm. Although students are always a good storm, filling the forest preserve with energy, it is inside these few moments of quiet before the bus arrives that nature seems to poke its head out to see if the coast is clear. This particular morning, the glassy water became rippled in V-shapes like geese migrating in the sky. A lone muskrat (Ondatra zibethicus) slid through the water towards a clump of cattail, its snake-like tail slithering behind him.