Sine Song (audio) Princeton University Loading audio... Caption This file is of the sine portion of the male fruit fly's song. The researchers found that, in general, males sang loudly -- or produced more pulses -- when females were farther away and moving quickly. Upon catching up to a female, males shifted to a song with more of the quieter sines. Most importantly, the researchers found that the neural circuits that guide the male's movement also determine the pattern -- the composition of pulses versus sines -- of his song. Credit Video and audio files courtesy of Philip Coen, Princeton Neuroscience Institute Usage Restrictions None 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.