The Question and Answer section for The Scarlet Ibis is a great resource to ask questions, find answers, and discuss the novel.
The beautiful read bird foreshadows Doodle's death.
From the text (words contributing to the mood of sadness and longing are highlighted in bold lettering)
It was in the clove of seasons, summer was dead but autumn had not yet been born, that the ibis lit in the bleeding tree. The flower garden was...
From the text:
Everybody thought he was going to die-everybody except Aunt Nicey, who had delivered him. She said he would live because he was born in a caul,3 and cauls were made from Jesus' nightgown.