Porcupine
Orcupine, any of 25 species of large, herbivorous, quill-bearing rodents
active from early evening to dawn. All have short, stocky legs, but
their tails range from short to long, with some being prehensile. The
quills, or spines, take various forms depending on the species, but all
are modified hairs embedded in skin musculature. Old World porcupines
(Hystricidae) have quills embedded in clusters, whereas in New World
porcupines (Erethizontidae) single quills are interspersed with
bristles, underfur, and hair. No porcupine can throw its quills, but
they detach easily and will remain embedded in an attacker.
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