I also heard earlier that there were "dozens" of dead birds, rather than a dozen. I don't trust the local paper either.
Local TV says they tested air quality early this AM and all is OK. They said ~2 dozen dead birds, all located in one area near 9th street.
Lots of 1st responder types wandering around along with police, fire, and EMS. Feds are there "supporting" first responders, I did not catch the name of the agency. Looks kinda goofy at this point, but at the same time it's having a high impact on downtown business.