Banished to a remote Idaho valley, beavers created a lush wetland
Definitely a good thing, but i cannot think of any other mammal that so enrages land owners.  If you have beavers on your land, you are now on thier land.  There just isnt any way to prepare a house, road, field or any other area the beavers want to inundated.  You jut have to give up and biuld elsewhere.