The animal known for its spines is the porcupine. These rodents are recognized for their unique defense mechanism, which involves sharp quills that can detach and embed themselves in predators. Porcupines are nocturnal and are typically found in forests, cliffs, and grasslands across both North and South America. They primarily feed on leaves, fruits, and bark, using their long front teeth to access food. Their spines are actually modified hairs coated with keratin, making them an effective deterrent. Interestingly, porcupines are not aggressive but will defend themselves when threatened.