Groundhogs are not hogs at all but rodents. They are, in fact, a type of rodent called a marmot, and they are native to North America. They live in dens dug in the ground and often have one den for summer and one for win... More » Pets & Animals Mammals Rodents

Animals of all varieties hibernate, including mammals, reptiles and insects. Hibernating mammals include bears, squirrels, groundhogs, raccoons and skunks; hibernating reptiles include frogs, turtles, lizards, snakes and... More » Science Biology Zoology

Archaebacteria include many unique characteristics and traits: they comprise one kingdom of living organisms, are among the oldest life forms on earth and prefer to live in the most extreme environments on the earth to n... More » Science Biology
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Lemmings are small rodents that often live in the tundra and grow white coats during the winter to help them blend in to their surroundings. Despite popular belief, lemmings don't actually commit suicide when food turns ... More » Pets & Animals Mammals Rodents

Gophers are burrowing rodents that range in North and Central America. There are a total of 37 species of gophers, nearly half of which live in the United states. One such species, the plains pocket gopher, grows up to 1... More » Pets & Animals Mammals Rodents

Porcupines are rodents with sharp quills that cover their entire bodies. One porcupine has as many as 30,000 quills on its back, sides and tail. More » Pets & Animals Mammals Rodents

Squirrels are rodents, which means their teeth continue to grow throughout their lives. This allows squirrels to eat diets of nuts, roots and other fairly rough vegetable material without their teeth being worn down. How... More » Pets & Animals Mammals Rodents