What does the last sentence of scarlet ibis mean?

In the final line, "ibis" contains a pun referring to the name of the main character, Doodle. Throughout the story, Doodle is referred to as a "scarlet ibis" because he stands out from the other children due to his physical disabilities and fragile health. The last sentence "The scarlet ibis lay still and rigid, its wings stretched wide in the circle of red light" signifies the passing of Doodle and serves to emphasize the tragic and irreplaceable loss felt by the narrator.