write short notes on rats.
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Answer:
Rats are various medium-sized, long-tailed rodents. Species of rats are found throughout the order Rodentia, but stereotypical rats are found in the genus Rattus. Other rat genera include Neotoma (pack rats), Bandicota (bandicoot rats) and DipodomysThe best-known rat species are the black rat (Rattus rattus) and the brown rat (Rattus norvegicus). This group, generally known as the Old World rats or true rats, originated in Asia. Rats are bigger than most Old World mice, which are their relatives, but seldom weigh over 500 grams (1.1 lb) in the wild.[1]
The term rat is also used in the names of other small mammals that are not true rats. Examples include the North American pack rats (aka wood rats[2]) and a number of species loosely called kangaroo rats.[2] 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, does, pregnant or parent females, dams; and infants, kittens or pups. A group of rats is referred to as a mischief.[3]
The common species are opportunistic survivors and often live with and near humans; therefore, they are known as commensals. They may cause substantial food losses, especially in developing countries.[4] However, the widely distributed and problematic commensal species of rats are a minority in this diverse genus. Many species of rats are island endemics, some of which have become endangered due to habitat loss or competition with the brown, black, or Polynesian rat.[5]
Skeleton of a black rat (Rattus rattus) on display at the Museum of Osteology.
Wild rodents, including rats, can carry many different zoonotic pathogens, such as Leptospira, Toxoplasma gondii, and Campylobacter.[6] The Black Death is traditionally believed to have been caused by the microorganism Yersinia pestis, carried by the tropical rat flea (Xenopsylla cheopis), which preyed on black rats living in European cities during the epidemic outbreaks of the Middle Ages; these rats were used as transport hosts. Another zoonotic disease linked to the rat is foot-and-mouth disease.[7]
A rat in a suburb of Vancouver
Rats become sexually mature at age 6 weeks, but reach social maturity at about 5 to 6 months of age. The average lifespan of rats varies by species, but many only live about a year due to predation.[8]
The black and brown rats diverged from other Old World rats in the forests of Asia during the beginning of the Pleistocene.[9] (kangaroo rats).
Rats
Temporal range: Early Pleistocene – Recent
Rattus norvegicus 1.jpg
Brown rat (Rattus norvegicus)
Scientific classificatione
Kingdom:
Animalia
Phylum:
Chordata
Class:
Mammalia
(unranked):
Glires
Order:
Rodentia
Bowdich, 1821
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Rats are typically distinguished from mice by their size. Generally, when someone discovers a large muroid rodent, its common name includes the term rat, while if it is smaller, its name includes the term mouse. The common terms rat and mouse are not taxonomically specific
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Answer:
Rats are a kind of animal found in most parts of the world. This lesson will teach you about rats, where they live, how to tell them apart from mice, what they eat, and some other cool facts you might not know about these animals.
What Is a Rat?
Imagine sitting in your room doing homework when you hear a scratching and thumping sound in your roof. At first, you think your ears are playing tricks on you, but then you hear it again. You look up into the vent on your ceiling and see two beady little eyes looking back at you. You have rats living in your attic!
Imagine sitting in your room doing homework when you hear a scratching and thumping sound in your roof. At first, you think your ears are playing tricks on you, but then you hear it again. You look up into the vent on your ceiling and see two beady little eyes looking back at you. You have rats living in your attic!Rats are rodents, which are small animals with sharp front teeth that gnaw. Rats have pointy noses, long, hairless tails and brown, gray, black or white fur, and they're known to chew through things like concrete cinder blocks and metal sheets. They can cause a lot of damage and are usually considered pests.