Caterpillars

Caterpillars are wriggly little worm-like critters with numerous eggs. They are the larval form of moths, butterflies, and occasionally... giant monsters. They are not particularly dangerous, but they eat everything.

Then of course there's Mothra. Mothra, or Mosura as it is known overseas, is a fictional giant animal/giant monster popularized in films of the Japanese tokusatsu daikaiju genres. The creature was brought to life through the use of puppetry and marionation and has been presented in two distinctive forms; larval form, in which appears as one or more giant caterpillar creatures and imago, which is how Mothra appears in moth form. It first appeared in the 1961 science fiction film, Mothra, but was later incorporated into the Godzilla film series by Toho Company.

In film

 * Freddy vs. Jason: Freddy Krueger takes the form of a demonic caterpillar, patterned after the creature seen in Alice in Wonderland and smokes from a hookah. He appears in a dream had by Bill Freeburg and uses this dream form as a means for taking possession of the boy in order to combat the threat of Jason Voorhees.