Howler monkeys playing (IMAGE) Anglia Ruskin University Caption Howler monkeys - photo by Norberto Asensio Credit Please credit Norberto Asensio Usage Restrictions Free to use with credit License Original 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.