- "Why spiders!? Why couldn't it be "follow the butterflies"?!"
- —Ron Weasley on following the spiders[src]
In 1993, shortly after Rubeus Hagrid was sent to Azkaban and Albus Dumbledore was suspended as Headmaster of Hogwarts School of Witchcraft and Wizardry, Harry Potter and Ronald Weasley had to follow some spiders to which Ron protested and asked why Hagrid didn't say Follow the butterflies.
In 1994 when Beauxbatons Academy of Magic arrived at Hogwarts to participate in the Triwizard Tournament the beautiful Beauxbatons students conjured some blue butterflies. Additionally, as the students of Hogwarts prepared to meet the Beauxbatons and Durmstrang delegations, Parvati Patil wore a large ornamental butterfly on the end of her plait, but Professor McGonagall found it "ridiculous" and made her remove it.
- Harry Potter and the Philosopher's Stone (video game) (First appearance)
- Harry Potter and the Chamber of Secrets (First mentioned)
- Harry Potter and the Chamber of Secrets (film)
- Harry Potter and the Chamber of Secrets (video game)
- Harry Potter and the Prisoner of Azkaban (film) (Sugared Butterfly Wings)
- Harry Potter and the Goblet of Fire (as ornamental decoration)
- Harry Potter and the Goblet of Fire (film)
- Harry Potter and the Deathly Hallows
- Harry Potter and the Deathly Hallows: Part 1 (video game)
- Wonderbook: Book of Spells
- Harry Potter: The Character Vault (mentioned only)