	The American "March of the Pigs" CD single contains two mixes of the title track, two remixes of its fellow "The Downward Spiral" track "Reptile," and "A Violet Fluid," a non-album instrumental track. In the UK, the single was released as a two-disc (each sold separately) CD single, adding a censored radio edit of "March of the Pigs" and "Big Man With a Gun" from "The Downward Spiral". The disc art for this single features a curled-up millipede, an image that was later used on the cover of the single "Closer".