Call for 'Approach and Scan for Danger' (AUDIO) Uppsala University Your browser does not support the audio element. Caption Dr. Suzuki and colleagues could demonstrate that ABC calls signifies 'scan for danger', for example when encountering a perched predator, whereas D calls signify "come here," for example when discovering a new food source, or to recruit the partner to their nest box. Tits often combine these two calls into ABC-D calls such as when approaching and deterring predators. When these two calls are played together in the naturally occurring order (ABC-D), then birds both approach and scan for danger. However, when the call ordering is artificially reversed (D-ABC), birds do not respond. Credit Toshitaka Suzuki Usage Restrictions May only be published in connection to reports about the study by Toshitaka Suzuki at al. 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.