The Tone of the story is very sad. While it does have its joyful moments, it's overall feel is rather dark. An example of this would be when Doodle finds the Ibis dead under a tree.
The Scarlet Ibis uses lots of different parts of speech, such as "He co lapsed onto the grass like a half-empty flour sack." This shows that the author wanted to make the story seem as dramatic as possible.
The imagery in the story shows that the author wanted to be as descriptive as possible when describing a person or place. An example of this would be when the author says "Summer was dead but autumn had not yet been born."
The style in which the story is written is made up of elements that highlight both positive and negative attitudes. An example of this would be when the author shows that the narrator is having fun with Doodle, while other times he just wants to get rid of him.
The theme of the Scarlet Ibis is that you should always treat your family with respect. You never know when when it will be your last day with them. In the story, the narrator is mean to Doodle because of his disabilities. When Doodle sadly dies, the narrator feels regret about not being as nice to him while he was alive.