Rob Palmer, Animal Behavior: Birds, winner
"In January 2009, something strange happened at a cattle feedlot in Colorado. Rob noticed a group of bald eagles sitting in a large tree nearby. Usually, bald eagles hunt near water. Usually, they eat fish — but they are also opportunists. These ones had gathered to feed on starlings and red-winged blackbirds and would launch themselves out of the trees and chase the small birds up into the sky."