Male Mouse Starts to Call (IMAGE) Duke University Caption After smelling the urine of a female mouse, a male mouse starts to call to her using a complex string of utterances (depicted in the sonogram which shows frequency of sound over time). Researchers think that such songs give way to simpler tunes after the male is in the physical presence of the female. Credit Credit - Jonathan Chabout, Duke University 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.