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| | World Almanac for Kids |
 | | The family is typified by the common porcupine, Hystrix cristata, which is thick-bodied, grizzled, and fl in color; it grows to a length of 60 cm (24 in), with some of its quills exceeding 30 cm (12 in) in length. |
 | | The Erethizontidae, comprising the New World porcupines, include four forms: the tree porcupine of Central and South America, which has a prehensile tail; the Canada porcupine, Erethizon dorsatum; the thin-spined porcupine of Brazil; and the Amazonian porcupine. |
 | | The Canada porcupine is found in heavily wooded regions throughout North America, from Alaska to the northern extreme of Mexico. |
| www.worldalmanacforkids.com /explore/animals/porcupine.html (193 words) |
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