I found a few of these piles of vegetation heaped up above the water's surface in a shallow cove in November of 2021, and have since discovered that they're the winter larders of muskrats (Ondatra zibethicus), which remain active all winter long.
I found a few of these piles of vegetation heaped up above the water's surface in a shallow cove in November of 2021, and have since discovered that they're the winter larders of muskrats (Ondatra zibethicus), which remain active all winter long.