Male Fallow Deer Calling (IMAGE) Queen Mary University of London Caption Male fallow deer can call for a mate more than 3000 times per hour during the rut (peak of the mating season), and their efforts in calling, fighting and mating can leave them sounding hoarse. Researchers for Queen Mary University of London have found 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. 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.