Answer:
Without more context, it is impossible to determine what the bird's song symbolizes for the speaker. The bird's song can have different meanings depending on the context in which it is presented, as well as the speaker's personal experiences and perspectives. In literature, the symbolism of a bird's song can vary greatly depending on the author's intention and the specific cultural and literary traditions involved.
If you have more information or context about the specific poem or story you are referring to, I could try to help you interpret the symbolism of the bird's song.