Macaque Stress Study (IMAGE) University of Manchester Caption This shows a mother and baby Babary macaque at Trentham Monkey Forest in Staffordshire, United Kingdom. The stress hormone levels in female macaques has been directly linked to their behavior demonstrating that higher levels are found in middle ranking macaques that display more agonistic behavior. Credit Trentham Monkey Reserve 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.