I have two ponds that are old borrow pits, no cover in the ponds other than the grass growing on them. During the drought a few years ago, the ponds mostly dried up. While they were low, I went in and planted some cypress trees to improve the fish habitat in the ponds. Then a couple of years ago some beavers moved in. I thought, "Cool, we have beavers in our pond." Then they cut down all but two of my cypress trees...
I am no longer a big fan of beavers.