LYCOS RETRIEVER 
Rats: Kangaroo Rats
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Kangaroo Rats are solitary animals with a home range of less than one-half acre; the female's home territory is usually smaller than the males. They live in burrows they dig themselves. The burrows go into the ground at an angle, are 1.5 to 3 inches in diameter and shaped like an inverted U, though flat on the bottom.
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The group is generally known as the Old World rats or true rats, and originated in Asia. Rats are bigger than most of their relatives, the Old World mice, but seldom weigh over 500 grams (1 lb) in the wild. The common term "rat" is ... used in the names of other small mammals which are not true rats. Examples include the North American pack rats, a number of species loosely called kangaroo rats, and a number of others. Rats such as the Bandicoot rat Bandicota bengalensis are murine rodents related to the true rats, but are not members of the genus Rattus. The widely distributed and problematic commensal species of rats represent a minority in this diverse genus.
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Most Kangaroo Rats gather seeds when they are available and cache (store) them for consumption later. Typically, caches are made in small pits on the surface of the soil, scattered over the home range of the individual. The small caches hold only the contents of two cheek pouches.
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Kangaroo Rats