Introducing Doug Dung Beetle’s other cousin – Tom Tunneler. You may recall from previous posts there are three types of dung beetles: Rollers (Doug), Dwellers and Tunnellers. Well, this is the full set of Doug’s extended family. Tunnellers like to dive deep into dung, then start tunnelling their way through the dung and deep into the earth below. not only does this provide a nice safe home for the beetle, it also acts as a breeding spot for the little baby dung beetle eggs. Unfortunately for Tom, methane gas is explosive.