Introduction:
The Nightingale is a famous poem by John Keats. It tells the story of a nightingale that sings so beautifully that it attracts the attention of the poet. The Nightingale speaks to several trees during the course of the poem, but it is the first tree that it speaks to that is the most significant.

The First Tree:
The Nightingale speaks to a large oak tree at the beginning of the poem. It is significant because it is the first time that the Nightingale speaks. The oak tree represents nature and the natural world, which is a recurring theme in the poem.

The Conversation:
The Nightingale asks the oak tree if it has ever heard the song of the nightingale. The oak tree responds that it has heard many beautiful songs, but none as beautiful as the nightingale's. The Nightingale then asks the oak tree to tell it about the beauty of the world. The oak tree responds by saying that the world is full of beauty, but it is also full of pain and suffering. The Nightingale then asks the oak tree if it has ever experienced love. The oak tree responds that it has not, but it has seen many creatures in love.

The Significance:
The conversation between the Nightingale and the oak tree is significant because it sets the tone for the rest of the poem. It establishes the theme of nature and the natural world and introduces the idea of beauty and love. The oak tree's response that the world is full of pain and suffering foreshadows the Nightingale's later lament about the transience of beauty and the inevitability of death.

Conclusion:
In conclusion, the Nightingale speaks to a large oak tree at the beginning of the poem. The conversation between the two establishes the themes of nature, beauty, and love that are central to the poem. The oak tree's response that the world is full of pain and suffering foreshadows the Nightingale's later lament about the transience of beauty and the inevitability of death.