They grow #unnaturally wide, so when their legs fail, or they are knocked over by the crowds of panicked ducks, they become trapped on their backs and cannot right themselves.

We filmed one #duck #trapped on their back for 20 hours, struggling to right themselves, becoming increasingly desperate. It was only after almost a whole day when a worker booted them back over when they could struggle away, collapsing again, clearly in #shock.

6/16