Murmuration

In what could be a scene right out of Alfred Hitchcock's "The Birds", thousands of starlings treated Israeli bird watchers to an incredible, yet rare, spectacle of synchronized aerial acrobatics.

The synchronized flying known as "murmuration" occurs when upwards of a thousand or more starlings fly en masse in choreographed moves. The event typically occurs at dusk.
Read more: http://www.digitaljournal.com/article/342346#ixzz2JP13GRfO

Absolutely awesome.