Poznan Zoo birds

Holy crap that's a lot of birds. Do they get fed here or something?

I counted 30 swans, adults with their offspring, and about 120 various ducks and also about 40 coots not forgetting about herons (common and two white) LOL Yes, zookeepers feed them regularly and make holes in ice - this is one of Zoo's lakes where birds live freely - so that they can survive strong Polish winter