North American porcupine More than 30,000 quills cover the body of the North American porcupine (Erethizon dorsatum). (more) Are Porcupines Aggressive? Ask the Chatbot a Question More Actions Share Share Share to social media Facebook X URL https://www.britannica.com/science/Are-Porcupines-Aggressive Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you for your feedback Our editors will review what you’ve submitted and determine whether to revise the article.

　　External Websites Ask the Chatbot a Question Written by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... The Editors of Encyclopaedia Britannica Last Updated: Sep 2, 2025 • Article History Table of Contents Table of Contents Ask the Chatbot Porcupines are not aggressive. Their behavior is rooted in self-preservation. When faced with a threat, they turn their rear, where their quills are most concentrated, toward the perceived danger. These quills, which detach upon contact and embed in an attacker, are a passive defense mechanism rather than an active offensive action. The quills of a porcupine are a highly effective deterrent against predators. The North American porcupine, for example, has more than 30,000 quills covering its body. These quills are covered in barbs, making them difficult to remove once embedded in an attacker. Porcupines are generally solitary animals, which further ...(100 of 145 words)

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