Two Male Fallow Deer (IMAGE) Queen Mary University of London Caption Male fallow deer are sensitive to changes in the groans that rivals make during mating season when competing for the attention of female deer and can assess the level of threat other males pose simply from vocal cues, according to new research from Queen Mary University of London. Credit Queen Mary University of London Usage Restrictions Please credit Queen Mary University of London 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.