Infrared camera image of deer populations (IMAGE) Purdue University Caption White-tailed deer herds captured using an infrared camera on a Purdue Aviation Sky Arrow aircraft. Each white dot represents a white-tailed deer. Credit Purdue University/Emma Johnson Usage Restrictions News organizations may use this image in reports about the work of Purdue University’s Patrick Zollner and his collaborators. License Original 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.