The Weird West
A species of great worms commonly called “Rattlers” because their approach sends the teeth chattering, their scientific name is Megascolecidae Shaihuludus. Most prevalent in the Mojave, they are also found in isolated flatlands throughout the West. It is believe that Rattlers sense their prey through vibrations in the soil, though attempts to confirm this hypothesis have so far ended in disaster.
The life-cycles of these great beasts are not fully understood, but it is clear that Rattler young emerge on the surface to hunt once they have grown to three feet in length. As the approach adulthood, the submerge again only to return at their fully grown length of 150 feet.
The party fought and killed an adult Ratter and its young near Salt Lake City.