Bhashya
हंसोऽपि मद्गुष्टे पादं वक्तेत्युपरराम ।मद्गुः उदकचरः पक्षी, स च अप्संबन्धात्प्राणः ।स ह श्वोभूते इत्यादि पूर्ववत् ॥
In plain words
Even the swan said, 'The cormorant will teach you a quarter,' and fell silent. A madgu is a water-bird, and on account of its connection with water, it represents prana. The rest follows as described before.
Close to the Sanskrit
Even the swan said, 'The cormorant will speak to you a quarter,' and stopped. Madgu is a water-frequenting bird, and because of its connection with water, it is prana. He on the morrow, and so forth, as before.