Pukwudgies are small, troll-like creatures from Wampanoag mythology. They are hard to spot because they can make themselves look like porcupines from behind, or simply disappear.
These creatures are very troublesome. They’re known to kidnap children and push people off cliffs, and they’re even said to control the souls of the people they kill.
When I did a google image search for pukwudgies, this image came up. It seems to be an appropriate response to pukwudgie mischief: