It's a toss up!

Beaver, muskrat, and river otter are all accomplished swimmers.

Beavers venture onto land to take down trees in order to access the cambium layer (beneath the bark), which is what they consume. You will see evidence of these chews all up and down the stream.

Muskrats eat the roots or rhizomes of cattail, sedge, bullrush, arrowhead, waterlily, pondweed and other plants that grow in or near the water on the stream They also consume freshwater clams they find in the mud.

Otters feed on fish, amphibians, crayfish and occasionally a small bird or mammal. They often leave their scat of fish scales in large deposits called latrines. Often there is an otter latrine on the trail by the abandoned beaver hut before you get to Gardiner Paperboard Dam on Harrison Avenue Nature Trail.