In the story The Scarlet Ibis what was doodle doing when he died?

In "The Scarlet Ibis," Doodle died after a storm while he was trying to keep up with his older brother as they fled home. Exhausted and overwhelmed by the rain and wind, he collapsed in a field. His brother, realizing Doodle was missing, returned to find him, but it was too late; Doodle had succumbed to his physical limitations. The tragic moment highlights themes of brotherhood, pride, and the fragility of life.