Whoa! This is creepy yet kind of cool! Definitely feels like it’s out of a horror movie, but turns out, it all has to do with birds migrating.
BirdCast, a migration tool led by Cornell University’s Lab of Ornithology, projects a swell of as many as 53,400 birds over the city this evening. To put that in perspective, roughly 3,000 birds flew over Philly on Sunday night ahead of the pack.