Fireworks are nice, but this is sad, although statistically insignificant.
This year in Warsaw, around midnight, terrified crow birds, probably rooks, were fleeing from fireworks from time to time, even in groups. Raven birds rarely fly with lantern lights all year around too.
One year, scared dog of my neighbor's was killed by a car.
Edited later:
Perhaps AUTOPSY would shed light on that strange event - broken bones, damaged internal organs, heart attacks. But nobody takes care about details. Most likely they got scared to death, panicked and hit something - buildings, themselves. But maybe the roar of fireworks temporarily disabled their brains or they got blind or they started to follow fireworks instead of stars or lost orientation in another way or felt dizzy from following moving fireworks and started vomiting ON EACH OTHER in flight like on a merry-go-round or they inhaled smoke and started choking or their eyes ran dry ?