Prompt Call (AUDIO) University of Zurich Your browser does not support the audio element. Caption When feeding chicks in the nest the chestnut-crowned babbler (Pomatostomus ruficeps) emits 'BAB' provisioning calls. Credit Sabrina Engesser 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.