Giant slugs tend to travel at night, as the creatures dislike sunlight and dry weather. They have been known to seek out locations like barns, the undersides of bridges, or even fortifications like castles for shelter as dawn starts to break. Woe to the unprepared farmer who ambles out at sunrise to milk the cows but instead finds that a giant slug has made the barn its home! Subterranean giant slugs don't have to worry about sunlight, and crawl about on no schedule in particular. Narrow tunnels pose little obstacle for them, as the creatures can easily compress their bodies. These factors make their movements very unpredictable, so they pose quite a menace for underground peoples like kobolds or xulgaths.