1 of 11
Credit: Smithsonian's National Zoo
Though they grow up to be decidedly un-cuddly, baby porcupines are comparatively soft. This baby girl prehensile-tailed porcupine was born in April 2005 at the Smithsonian's National Zoo in Washington, D.C.As the babies grow to adult size over about a year, they gradually losetheir red hair and grow stiff, sharp spines. These creatures are rodents native to Central and South America. Their tails ("prehensile" means adapted for grasping or holding) act as fifth limbs to help grab branches while climbing.