Vocalizations of the Giant South American River Turtle (audio) Wildlife Conservation Society Share Print E-Mail Loading audio... Caption These are vocalizations made between adults and hatchlings (individual sounds repeated for the listener's benefit). Credit C. Ferrara/Wildlife Conservation Society Usage Restrictions One-time usage only. Share Print E-Mail 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.