Did it fall asleep with its beak in the water?

Maybe it was pranked by some fishies.

Reddit:  "Thanks for the fish fellas, put it on my bill!"

Fishies that don't want to get eaten!

You were right, according to Reddit.

Apparently he fell asleep with his bill slightly underwater but made a full recovery in the "swan house".

Ha! Apparently the swan is okay:

http://www.grindtv.com/outdoor/outposts/post/rescuers-save-swan-bill-freezes-shut/

Found in this set of more Imgur comments: http://imgur.com/gallery/OZaRqKK

Awesome!  What a productive thread!

Yeah, I like when we find a good thread on Imgur or Reddit.

Sometimes I stash just for the thread.