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The North American porcupine, Erethizon dorsatum, is a large rodent that is common in Utah. It prefers coniferous forest and mixed forest areas, although it may also be found in wetlands, deserts, and shrub-land habitats. Porcupine winter dens may be found in hollow trees and logs, small caves and rock piles. Adults average 9-13 pounds. They are active throughout the year and are mainly nocturnal, but are often visible during the day. Porcupines are excellent climbers and spend much of their time in trees. Their diet includes bark, berries, buds, fruits, and leaves. Porcupines are covered in sharp spines, or quills, that are used for protection from predators. Quills are loosely attached to the body and may detach from the porcupine and lodge in a predator if touched; porcupines cannot “shoot” their quills.
Porcupines are protected animals in Utah.
Porcupine chewing on a pine tree
Pets and Porcupines:
Keep pets under control and do not let them play with wildlife. Porcupine quills are barbed and can embed in the skin. Consult a veterinarian to have the quills removed.
SHARE THE WILD:
Most porcupine damage occurs during the winter when the bark of trees and shrubs make up their main diet. It’s common for porcupines to feed on nearly all species of trees within their range. Preferred trees include: elm, fir, maple, oak, pine, poplar, spruce and numerous fruit-bearing and ornamental trees as well as shrubs.
In summer, porcupines are almost exclusively ground-feeders where they eat grasses, forbs such as dandelions, and succulent streamside and wetland plants.
They are also attracted to salt. On occasion porcupines can be attracted to the wood handles of tools, wheelbarrows and gloves because of salty sweat absorbed in those items. If you have these attractants around your property porcupines may come looking for a snack.
Predators like coyotes, cougars and bobcats prey on porcupines. They may follow their prey onto your property.
Tree gnawed on by a porcupine
Reduce tree damage by enclosing small trees with wire baskets.
Encircle the trunks of large trees with 30-inch bands of aluminum flashing. Do not leave banding permanently, as it can cause damage as the tree grows.
Keep all tools picked up and locked securely away.
Some commercial rodent repellents may discourage porcupines from gnawing, but they do need to be reapplied often.
Electric wire attached to the top of 18-inch-high poultry fencing, can be used as a deterrent. Porcupines can climb fences, but a 65 degree angled overhang at the top of the fence will discourage them.
Block off crawl spaces and remove rock and woodpiles to prevent porcupines from finding shelter.