A butterfly is a small insect.
When talking about his afterlife believes, Bart says he wants to come back as a butterfly, because "nobody ever suspects the butterfly". Bart then imagines the school burnt down, with Skinner being arrested for it, while a Bart butterfly is seen with a gas can.
While sleeping, Homer swallows a caterpillar which exits his mouth as a butterfly.
- Simpsons short – "Babysitting Maggie"
- Episode – "'Round Springfield" Bart butterfly
- Episode – "Missionary: Impossible"
- Episode – "A Star Is Born-Again"
- Episode – "The Longest Daycare"