When the male wants to know the location of his mate, he begins a series of melodic notes, and the female joins in, even though she may be some distance away.
स्वरमेळ करण्याची ही वेळ इतकी चोख असते जणू आधीपासूनच त्यांनी आपले द्वंद्वगीत ठरवले असावे.