Butterfly was a warrior Vrill. He was hatched by the Seventh Doctor with the TARDIS key. He was named for patterns on his wings. He was killed by Jackson. (AUDIO: Survival of the Fittest) Retrieved from "https://tardis.fandom.com/wiki/Butterfly_(Survival_of_the_Fittest)?oldid=2642730" Categories: Warriors Individual Vrill + cat Cancel Save Community content is available under CC-BY-SA unless otherwise noted.