What waterfowl species have been hanging out there recently? I remember when they had some nene geese in here (before the current native wildlife habitat theme, which I think suits it much better).
We used to have Hooded Mergansers, Northern Pintails, and Ruddy Ducks inhabiting this exhibit permanently, but they have been moved to a few other exhibits in the zoo. I have seen wild Mallards, Wood Ducks, and Coots in this exhibit before.