Gibbon Call (1 of 2) (AUDIO) Wiley Your browser does not support the audio element. Caption This is a gibbon call without helium. Credit Takeshi Nishimura 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.