Daft study if you ask me.
Most corvoids tend to work themselves in to a frenzy if they find a dead mate of theirs. Quite often they'll make enough racket that half the neighbourhood will come and join in. I've personally seen 50+(rough guess) rooks, crows, magpies and a couple of jays going mental over a crow decoy left on its side in a field.
Biting the hand that feeds IT
