Male blue monkeys alarm call in response to danger experienced by others

摘要: Male blue monkeys (Cercopithecus mitis stuhlmanni) of Budongo Forest, Uganda, produce two acoustically distinct alarm calls: hacks to crowned eagles (Stephanoaetus coronatus) and pyows leopards (Panthera pardus) a range other disturbances. In playback experiments, males responded leopard growls exclusively with series eagle shrieks predominantly hacks. Responses playbacks these call matched the responses corresponding predators, suggesting that calls conveyed something about nature threat. When responding hacks, indicating an eagle, predominately but produced significantly more if their group members were close stimulus than far away, regardless own position. pyows, disturbances, rates independent distance members. The results suggest took into account degree danger experienced by