What was the Character sketch of nightingale in poem frog and nightingale?

The poem "The Frog and the Nightingale" by Vikram Seth does not feature the character of Nightingale. The poem, set in a pond teeming with life, presents a dialogue between a frog and another animal, possibly a bird, although its species is not explicitly named. Therefore, I cannot provide the character sketch of Nightingale since the poem does not include such a character.