Fishers are a primary predator of porcupines, but quills have been found embedded in coyotes, cougars, bobcats, foxes, lynxes, bears, wolves and even Great Horned Owls. These predators kill a porcupine by biting its unprotected face or by flipping it over to expose the vulnerable underside.

What are predators of porcupines?

A number of larger predators like coyotes, great horned owls and bobcats will take an occasional porcupine, but these predators have little impact on porcupine numbers. Fisher, however, are effective predators of porcupines and can control porcupine populations in areas where they both live.

How do coyotes kill porcupines?

Inspection of the porcupine's head confirmed the likelihood that coyotes were responsible, as fishers, notable porcupine predators, kill their prey by repeatedly attacking a porcupine's head, and the head of this porcupine was unscathed (see insert).