the theme of the scarlet ibis is illness/diseases because when doodle was born he had a major illness the doctor gave the family a list of do's and don't's. As doodle got older he was limited on what he could do. doodle never had the best childhood but he still enjoyed it.
doodle loved to play, so one day he and his brother went to ask their mom to play outside. Doodle was chasing his brother when he got exhausted then died later from sheer exhaustion (complete exhaustion). then a while later his brother found doodle on the ground dead.