Porcupines are nocturnal, solitary animals that most people are unaware of unless they see the damage they can cause to trees. Porcupines feed on the young bark, leaves and terminal twigs of trees. Damage is usually found high up in the branches of trees but can be found anywhere in the branches and even on the trunk of trees.             Porcupines prefer the inner bark, or phloem, which is more nutritious than the cambium or xylem tissue.            [...]