The narrator recalls Doodle birth, How Himself, Mama, Daddy, and his Aunty reacts to his birth. This was North Carolina early 1900s, old woman swamp, the farm
The narrator was disappointed with his disabled brother. He just wanted to do things with Doodle that only a "normal brother" could do which Doodle wasn't. The Narrator couldn't accept the fact what Doodle was.
After successfully teaching Doodle how to walk. The narrator pride makes him think that he can teach him how to be normal. During dinner time they walked outside to see a Scarlet Ibis die. Doodle felt a odd connection with the bird, maybe realizing they had something in common.
The Narrator in a fit of rage left his brother behind. When going back to search for him, he finds his brother covered in blood, dead.
While the brother is mourning, He protects Doodle from the rain with his body. His Scarlet Ibis has fallen.
The brother realizes he should've just accepted his brother the way he was.