Dead in the water

There must several hundred aquatic birds living at Warwick U, mostly of the breed in this pic, but plenty of shorter-necked ducks and a pair of swans too.

Which raises the question: how come I've never seen a dead one?

I mean, your average duck has a lifespan of a couple of years at most, which means a couple of ducks a week should make their last quacks. Yet I've never seen so much as a wobbly one wandering about at Lakeside.

Do ducks bury their dead or something? Where are the dead ones?