Hyena Giggle Calls (AUDIO) University of California - Berkeley Your browser does not support the audio element. Caption The giggle call of a dominant female hyena named Kadogo (who was 6 years old at the time of the study) is steady and seemingly confident, as opposed to the more variable calls of subordinate animals. Credit Frederic Theunissen/UC Berkeley 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.