Agropelter

The Agropelter (Latin, Anthrocephalus craniofractens) is a Fearsome Critter from North American folklore.

Description
A rare creature whose territory stretches from Maine all the way to Oregon, the Agropelter was described by its only witness - a man by the name of Big Ole Kittleson - as resembling a slim ape with long, whiplike arms. It uses these arms to snap off dead wood and hurl it with pinpoint accuracy and the power of a cannon at anybody unfortunate enough to pass beneath one of the hollow trees in which Agropelters like to make their home. It is therefore blamed for the death of any woodsman unfortunate enough to have been hit by a falling tree or branch.

These monsters subsist on a diet of hoot owls and woodpeckers, although the fact that their prey is so scarce prevents the Agropelter from breeding in any kind of numbers.