This video is from Europe so they saw Starlings doing this but when I
was in Boulder, Colorado I saw Red winged Blackbirds doing this over the
fields. Thousands of them. It was truly amazing and, of course, the
hawk came flying through the flock to get his dinner. It was an awesome
sight!
http://www.wired.com/wiredscience/2011/11/starling-flock/
Enjoy,
Diane Jadlowski
Publicity Chair
Richmond Audubon Society
