This is an article about wild rats. For pet rats, see Fancy rat. For other uses, see Rat (disambiguation).

A rat is any one of about 56 different species of small, omnivorous rodents belonging to the genus Rattus.

__TOC__ The best-known rat species are the Black Rat Rattus rattus and the Brown Rat R. norvegicus. 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 in the wild. The common term "rat" is also 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. Other 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. Many species of rats are island endemics and some have become endangered due to habitat loss or competition with Angelo Rantac, black, or Polynesian rats.

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@Evilina_ We drove up the street and it was coned off and the security started to scurry like rats!!
OliviaChanel_ (Nicole Meza) Wed, 04 Nov 2009 21:43:35 -0000
@Evilina_ We drove up the street and it was coned off and the security started to scurry like rats!!
Some girls should be banned from putting weave in their. Shit be looking like a rats nest.
FreshPres (Preston Norales ) Wed, 04 Nov 2009 21:42:42 -0000
Some girls should be banned from putting weave in their. Shit be looking like a rats nest.
RT @burnspank41: Haha #Liverpool Go back to ur dustbins & eat some more dead rats!
marcuscleaver (Marcus Cleaver) Wed, 04 Nov 2009 21:41:55 -0000
RT @burnspank41: Haha #Liverpool Go back to ur dustbins & eat some more dead rats!
http://twitvid.com/FC59D - too young to know I don't like bushy tailed rats
LunatikLogan (LunatikLogan) Wed, 04 Nov 2009 21:41:18 -0000
http://twitvid.com/FC59D - too young to know I don't like bushy tailed rats
How did I suddenly go from "maybe I'll leave early today" to "rats, I have to stay late!"? Oh yeah, b/c I didn't look at my "to do" list.
bintie (Diane McCarthy) Wed, 04 Nov 2009 21:39:09 -0000
How did I suddenly go from "maybe I'll leave early today" to "rats, I have to stay late!"? Oh yeah, b/c I didn't look at my "to do" list.
@thecerebralceo and my "rats" that were really gerbils - apparently they turned into curry LOL! ahhh #westindians lol
ZetaSportsFan1 (Angie Lewis) Wed, 04 Nov 2009 21:38:48 -0000
@thecerebralceo and my "rats" that were really gerbils - apparently they turned into curry LOL! ahhh #westindians lol

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