The document summarizes a poem about a frog and nightingale. The frog croaks loudly every night, while the nightingale sings beautifully. When the nightingale gains fame, the frog offers to train her voice to make it even better. However, the frog's training exhausts the nightingale, causing her voice to lose its beauty. She dies, allowing the frog to croak alone in the bog once more. The poem uses animals to convey themes of social criticism and the corrupt nature of developed societies driven by greed.