We have lots of ducks on campus, I'm sure one wouldn't be missed.
Actually there is one I could easily take home as a pet. Our bluegrass 'group' practises on the duckpond lawn and this one duck always comes to visit. It lets us pat it and it even tries to preen us - which is a bit painful. At first I though it recognised people carrying instruments but I've discovered it can recognise me from 25m away without the guitar. When I left campus yesterday I had to walk briskly to stop it following me. I don't know how far it would have followed me but I don't want to find out. So they can certainly get quite attached to people. I also second what Jeanette said about their toilet habits.