The sheer amount of migrating birds to die in a single night is called an 'outlier'
(Newser) -
On a typical morning, as many as 15 birds might be found dead outside Chicago's McCormick Place Lakeside Center, having fatally struck the building the night prior. On Thursday morning, a nearly unimaginable 964 of them were found dead, and another 80 were found stunned but still alive, according...