The Guardian.
Hundreds of yellow-headed blackbirds have been filmed falling out of the sky and dying in mysterious circumstances in the northern Mexican city of Cuauhtémoc. The cause of death remains unclear but experts said it was most likely the flock was “flushed” from above by a predatory bird swooping down to make a catch.

Mirrored from https://www.youtube.com/watch?v=2D2lrFemFig