The Y-maze (IMAGE) Lehigh University Caption Y?maze odor preference chamber (left) and odor donor chambers (right). During preference tests, an opaque screen prevents birds in the Y?maze from seeing birds in the odor donor chambers. The odor donor chambers are kept in darkness during the preference trials to keep the odor donor birds still and silent. Perches are not shown in photo. Credit Alex Van Huynh and Amber M. Rice Usage Restrictions None 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.