National Geographic : 1950 Aug
© National Geographic Society 253 Kodachrome by Donald A. Spencer Buckteeth Bared for Action; but Porky Is Set to Feed, Not Fight This Canadian porcupine's stout teeth will chip away the outer bark to reach the succulent inner layers. Enamel of his incisors is naturally orange; gnawing cleans them, keeps them from growing too long. He grips the branch with long, curved claws. If danger threatens, he whirls about to present raised quills and pincushion tail.