What I Think About The Dying Birds

I think it's weird that all of those birds died suddenly like that on New Year's Eve.  Since they tested the air and could find nothing in it, it makes me wonder how they all died so instantly.  I think that there might have been a lot of people setting off fireworks to kick off their new year.  I believe that the birds had to be flying in a big group near where people were setting off fireworks.  I think that the birds got spooked by them, and they all died as result of getting spooked.  This is just my opinion, i dont think anyone is really sure of what happened to all those birds on New Year's Eve in the midwest.