Sine Song (AUDIO) Princeton University Your browser does not support the audio element. 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 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.