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The North American porcupine migrated from South America, where all New World porcupines or hystricomorphs evolved. Erethizon appeared in North America shortly after the two continents joined together in the later Tertiary period. Other hystricomorphs also migrated, but Erethizon was the only one to survive north of Mexico. No known fossils are ...
The North American porcupine (Erethizon dorsatum) is the only extant species, but at least 4 extinct relatives are known, the oldest dating to the Late Pliocene. [2] Porcupines entered North America during the Great American Interchange after the Isthmus of Panama rose 3 million years ago. [3]
The North American porcupine is a herbivore and often climbs trees for food; it eats leaves, herbs, twigs, and green plants such as clover. In the winter, it may eat bark. [ 2 ] The African porcupine is not a climber; instead, it forages on the ground. [ 2 ]
They vary in size from the relatively small prehensile-tailed porcupines, which are around 30 cm (12 in) long, and weigh about 900 g (32 oz), to the much larger North American porcupine, which has a body length of 86 cm (34 in), and weighs up to 18 kg (40 lb).
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Erethizontinae is a subfamily of the New World porcupine family Erethizontidae, [1] and includes all species of the family with the exception of the bristle-spined rat, Chaetomys subspinosus, which is classified in its own subfamily, Chaetomyinae.
North American porcupine (Erethizon dorsatum) — uncommon in forested areas in the northern part of the state; usually found in mixed forests including eastern hemlock. [3] Porcupines are most common in northern Litchfield County, especially the towns of Hartland, Colebrook, and Norfolk.
Google said Monday it will enforce changes to the U.S. map, ... but a gold prospector advocated for America’s tallest mountain to be named in 1896 for McKinley, the Republican presidential ...