ties that be tested the Crows...What they found was the insecticide that they used in early spring to treat the corn field killed the Crows...There was a small article in the local paper about it..it was rather morbid and i felt bad for the Crows..Im not sure that the insectiside wasnt meant for the Crows..due to the fact that they can suppossedly pick apart a corn field...Sorry for spelling error