“Mariposa” is a short track with a bright lead synth line over a rising tone. Its title is the Spanish word for butterfly. The song, written by Stu, originates from a promotional video for Butterfly 3000, which shows the album’s title flickering over footage later seen in the music video for the title track. It saw an official release on Demos Vol. 3: Music To Eat Pond Scum To on July 15th, 2022. A sister track called “Kelebek” appears on Demos Vol. 4: Music To Die To.

“Mariposa” has not been played live.