Excellent PBS Nature episode on the subject too: http://www.pbs.org/wnet/nature/episodes/a-murder-of-crows/full-episode/5977/ http://www.pbs.org/wnet/nature/epi

Excellent PBS Nature episode on the subject too: http://www.pbs.org/wnet/nature/episodes/a-murder-of-crows/full-episode/5977/ http://www.pbs.org/wnet/nature/episodes/a-murder-of-crows/fu...