"The Obscene Bird of Night" is a novel by Chilean author José Donoso, published in 1970. The story explores themes of identity, madness, and the nature of reality through the lives of its characters, particularly focusing on Humberto Peñaloza, a man who becomes increasingly isolated and disconnected from society. Set in a surreal and often nightmarish landscape, the narrative intertwines various perspectives and experiences, reflecting the complexities of human existence. The novel is noted for its rich symbolism and intricate structure, making it a significant work in the genre of Latin American literature.