Attenborough goes on to say Having developed the technique they also practise it as a way of reinforcing the bond between them, singing their complex duets even while sitting next to one another on a branch and sometimes, if one of the pair is absent, the lonely bird will sing the full elaborate melody filling in the missing parts itself
द्वंद्वगीतांचा उपयोग प्रामुख्याने दाट झाडीत जिथे सहचर दिसणे अवघड होते अशा वेळी एकमेकांशी संचारण ठेवण्यासाठी होऊ शकतो.