Peeping Bugs

The Peeping Bugs are black creatures used by Madame Suliman in the film, Howl's Moving Castle.

Background
Upon visiting Sophie at her home, Honey left a bag which contained a black creature the Witch of the Waste called a "peeping bug". She dismisses it as an old trick and tosses it to Calcifer to dispose of. After eating the bug, Calcifer begins coughing up a strange smoke.