Capture with Threatening Mask (IMAGE) University of Washington Caption Crows were captured by investigators wearing threatening masks. Although never treated in a threatening way, the crows associated negative feelings with the mask. Credit Jack DeLap/U of Washington Usage Restrictions Credit required License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.