Valmiki Ramayana Kishkindha Kanda Sarga 1 Shloka 54

तदा then, विहङ्गः the birds flying in the sky, प्रणदितः cried out, पक्षी bird, यः वायसः that same crow, तां विना without her, पादपगतः sitting on the tree, प्रहृष्टम् happily, अभिनर्दति is singing joyfully

'The crow that cried unhappily flying in the sky as if to foretell my separation from Sita, is now on the tree, singing joyfully (suggesting my possible union with Sita).