Prehensile-tailed porcupines, like Smithsonian’s National Zoo’s 2-week-old porcupette, are born with the ability to climb! At birth, their quills are soft, but they harden within minutes. The name prehensile means “capable of grasping”; the underside of its tail lacks quills, allowing the porcupine to grip branches with this appendage and navigate the forest canopy with ease.