Maybe the ducks and geese were thrown about the atmosphere and built up a coating of ice as they were blown around. Just like hail stones ya know? That way when they plummet towards ground they inflict maximum damage and by the time the pic was taken they had thawed out.
Yeah, mix a little biology, meteorology, and B.S. together and I can come up with anything.
Regardless of what actually happened, I chuckled at the pictures.