In 2014 I created Ferris as the unofficial mascot for the Rust programming language.

My friends in the Rust community called themselves "Rustaceans", so I figured drawing a crab (crustacean) for them would be appropriate. The spikes on the top are from the sprocket in the official Rust logo.

In 2015, Steve Klabnik asked me to draw the cover art for The Rust Programming Language, in the black-and-white style of No Starch Press.

I also maintain rustacean.net as a repository for Ferris source art as well as many fan/derivative works (mine and others') over the years.