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Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus. Many members of other rodent genera and families are also called rats and share many characteristics with true rats.

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Wikipedia About Rats

Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus. Many members of other rodent genera and families are also called rats and share many characteristics with true rats.

Rats are typically distinguished from mice by their size; rats are generally large muroid rodents, while mice are generally small muroid rodents. The muroid family is very large and complex, and the common terms rat and mouse are not taxonomically specific. Generally, when someone discovers a large muroid, its common name includes the term rat, while if it is small, the name includes the term mouse - scientifically, the terms are not confined to members of the Rattus and Mus genera. Compare the taxonomic classification of the Pack rat and Cotton mouse.

Species and description

The best-known rat species are the Black Rat (Rattus rattus) and the Brown Rat (Rattus norvegicus). The group is generally known as the Old World rats or true rats, and originated in Asia. Rats are bigger than most Old World mice, which are their relatives, but seldom weigh over 500 grams (1 lb) in the wild.

The 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 others. Rats such as the Bandicoot rat (Bandicota bengalensis) are murine rodents related to true rats, but are not members of the genus Rattus. Male rats are called bucks, unmated females are called does, pregnant or parent females are called dams, and infants are called kittens or pups. A group of rats is either referred to as a pack or a mischief.

In Western countries, many people keep domesticated rats as pets. These are of the species R. norvegicus, which originated in the grasslands of China and spread to Europe and eventually, in 1775, to the New World. Pet rats are Brown Rats descended from those bred for research, and are often called "fancy rats", but are the same species as the common city "sewer" rat. Domesticated rats tend to be both more docile than their wild ancestors and more disease prone, presumably due to inbreeding.

The widely distributed and problematic commensal species of rats are 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 the Brown, Black or Polynesian rat.

The common species are opportunistic survivors and often live with and near humans. The Black Plague is traditionally believed to have been caused by the micro-organism Yersinia pestis, carried by the Tropical Rat Flea (Xenopsylla cheopis) which preyed on R. rattus living in European cities of the day; these rats were victims of the plague themselves.

Search results for Rats

Rat Behavior and Biology

Offers articles about rat behavior and biology. Includes humor, stories, health, art, spoofs, and more.www.ratbehavior.org/

Difference between Rats and Mice

As with rats, there are many species of rodents called mice which may or may not ... Norway rats and house mice belong to different species. ...www.ratbehavior.org/RatsMice.htm

Rat and Mouse Club of America

Information about the RMCA and the proper care and breeding of rats and mice.www.rmca.org/

Rats - Facts About Rats - Types of Rats - PestWorldforKids.org

Learn all about rats, facts about rats and different types of rats. ... Rats can live for up to 18 months, but most die before they are one year old. ...www.pestworldforkids.org/rats.html

Rats as Pets

What you need toknow about deciding on a rat as a pet - life span, size, and characteristics. ... Rats reach puberty very young - at 6-8 weeks of age. ...exoticpets.about.com/cs/careofrats/a/ratsaspets.htm

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News about Rats

Slumdog' kid actors back in squalor

Fort Wayne Journal GazetteRubina Ali's house is flooded with sewer water, and her feet itch. She's discovered a world of creepy-crawlies in the opaque gray water: scorpions, rats and slithery creatures with lots of legs. Photo caption: "Slumdog Millionaire" actress Rubina Ali wades through water in the Mumbai shack she shares with her father, Rafiq Qureshi, and stepmother, Munni. Photo by Associated Press photoshttp://www.journalgazette.net/article/20090510/FEAT/30510996...

City girls win state hoops tourney

Fort Wayne Journal GazetteThe Spiece Gym Rats FW 13U girls basketball team has brought home the Indiana AAU title.http://www.journalgazette.net/article/20090510/SPORTS/305109...

From Rats To Humans: Around Thirty Europeans Infected With Cowpox Virus By Their Pet Rats

Science DailyAround thirty Europeans, including twenty French citizens, have recently contracted a viral infection linked to their pet rat.http://www.sciencedaily.com/releases/2009/05/090507192933.ht...

Just When I thought I Was Out...They Pull Me Back In

About.comRats. Uncle Bill has given with one hand and taken away with another - again. What am I referring to? XP Mode for Windows 7. It appears that Windows 7...http://windows.about.com/b/2009/05/10/just-when-i-thought-i-...

Woman Fights To Keep Rats Out of Home

ABC 2 BaltimoreA Baltimore woman says rats are taking over her home. Deaon Snells blames the problem on a vacant lot next to her house that's being used as a dumping ground.http://www.abc2news.com/news/local/story/Woman-Fights-To-Kee...

News about Rats

British rats found immune to poisons

United Press InternationalLONDON, May 4 (UPI) -- Parts of Britain are being overrun by an exploding rat population that has developed a resistance to commonly used poisons, officials say. Complaint calls to local governments about rat infestations were up by 50,000 to 700,000 ... http://www.upi.com/Top_News/2009/05/04/British-rats-found-im...

Seeking English daisies, try seeds or hybrids

San Francisco GateTwo readers respond to recent columns on rats eating citrus fruit and bark: A few years ago , something was eating the bark of my Meyer lemon tree in San Francisco's West Portal area. Sloat Garden Center suggested I use Tanglefoot banding and slather ... http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2009/05/01/...

Rats extend early-bird offer through end of May

Times Union BlogsThe Albany River Rats today announced that the deal offering fans 20 percent off season-ticket prices if purchased early has been extended through the end of May. The deal originally was going to be discontinued April 30 . According to the team, the ... http://blogs.timesunion.com/hockey/?p=1902

Mothering heights

SalonIt's run by ignorant jerks and sewer rats (like the ones we were, before we had kids). As Sally Field once pointed out, if mothers ruled the world, there wouldn't be any goddamn wars. Instead, all of the nations of the globe would live in peace ... http://www.salon.com/mwt/feature/2009/05/10/mothers_day/

It's boom time for rats: Fears of population explosion as the rodents ...

Daily MailBritain is heading for a 'rat explosion' because the rodents are growing resistant to poisons, pest controllers say. In parts of the UK the vermin have become almost immune to conventional pesticides. The warning follows fears that the warming ... http://www.dailymail.co.uk/news/article-1176870/Its-boom-tim...

Search results for Rats

Rat Behavior and Biology

Articles about the behavior of rats, their biology and the sensory world they live in.http://www.ratbehavior.org/

Rat Assistance & Teaching Society: Home

A half a million households in the U.S. own pet rats or mice, yet because of the revulsion many people have toward wild rats, pet rats are often misunderstood and mistreated.http://www.petrats.org/

How to Get Rid of Rats - Rat Control, Rat Poisons, Rat Trapping, Rat ...

Specializing in rat control and rodent control products , how to get rid of rats, Do It Yourself Pest Control provides the products and expertise you need for residential and ... http://www.doyourownpestcontrol.com/rats.htm

RATS Product Information

RATS Econometrics Software. RATS (Regression Analysis of Time Series) is a fast, efficient, and comprehensive econometrics and time series analysis software package.http://www.estima.com/ratsmain.shtml

Rats

Rats : information about pet rats, types of rats, buying rats, caring for rats, rats for sale, products and supplies for rats, chat about ratshttp://www.petwebsite.com/rats.asp

Wikipedia results for Rats

Rat - Wikipedia, the free encyclopedia

Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat ... http://en.wikipedia.org/wiki/Rat

Brown Rat - Wikipedia, the free encyclopedia

The brown rat, common rat, Hanover rat, Norway rat, Norwegian rat, or wharf rat (Rattus norvegicus) is one of the best known and most common rats.http://en.wikipedia.org/wiki/Norway_rat

Regression Analysis of Time Series - Wikipedia, the free encyclopedia

RATS, an abbreviation of Regression Analysis of Time Series is a statistical package for time series analysis and econometrics. History: The forerunner of RATS was a FORTRAN ... http://en.wikipedia.org/wiki/RATS_(statistical_package)

Kangaroo rat - Wikipedia, the free encyclopedia

Kangaroo rats, genus Dipodomys, are small rodents native to North America. The name derives from their bipedal form: they hop like tiny kangaroos.http://en.wikipedia.org/wiki/Kangaroo_rats

Wharf Rats - Wikipedia, the free encyclopedia

The Wharf Rats are a group of concert-goers who have chosen to live drug and alcohol free. Their primary purpose at shows is to make themselves available to anyone who feels the ... http://en.wikipedia.org/wiki/Wharf_Rats
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Videos found for Rats

Cheetos: 'Sky Rats'

Cheetos: 'Sky Rats'Video from: Frito-Lay. (0:30).Windows Media - Video

Revenge of the rats in Pied Piper's...

Revenge of the rats in Pied Piper's town of HamelinAs an infestation of rats returns to the German town of Hamelin, there's no sign of a modern day Pied Piper to tackle the rodent plague.Flash - Video

Rats and maggots found on hospital ...

Rats and maggots found on hospital wardsHospital hygiene is under the spotlight once again after shocking details of rats, maggots and fleas on the wards were revealed. Almost 20,000 incidents of pest infestation have...Flash - Video

Roasted rats

Roasted ratsSouth East Asians tuck in to rat meat to celebrate Chinese New Year© Independent Television News Limited 2008. All rights reserved.Flash - Video

Cat vs. rat

Cat vs. ratCat smacks rat in the butt :) A clip from my Christmas video. No animals were harmed.Flash - Video

Answers for Rats

morganrats!!!!!!!!!!!!!!!!!!!!!!?morganDoes she have rat friends? She is probably bored seeing you cant have her out all the time (which is not possible anyways). Rats are very social animals and need a cage mate or two. Right now I have 4...Danielle SHow old do female rats have to be to get sprayed?Danielle SYes, it is true that it can prevent mammary tumor in female rats. It is said that a rat that is not spayed has a risk of 74% of getting one rather a rat that IS spayed has only a 4%risk. It is not nes...OobleckWhat rat cages do you reccomend for my 2 rats?OobleckI recommened Martin's Cages, as do rat lovers and owners everywhere, for they are easy to clean, spacious, and have an overall perfect design. The bar spacing is small enough so not even babies can es...REGINAMIARats have begun to nest in cars parked in NYC. How to get rid of them?REGINAMIATalk to an exterminator. You don't want to use rat poison as a cat or a dog could get into it. The exterminator should have some suggestions. Even moving your car every day, the rats could build a ...Pengchon VWhat happens to the rats after scientist are done using them for lab experiments?Pengchon VAs far as i know those animals used for testing must be put down after the experiment. After the experiment is done they are put to sleep in a quick humane way. This is good because if these animal...
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