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The brown rat (Rattus norvegicus), also known as the common rat, street rat, sewer rat, wharf rat, Hanover rat, Norway rat and Norwegian rat, is a widespread species of common rat. One of the largest muroids , it is a brown or grey rodent with a body length of up to 28 cm (11 in) long, and a tail slightly shorter than that.
The best-known Rattus species are the black rat (R. 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 Old World mice , which are their relatives, but seldom weigh over 500 grams (1.1 lb) in the wild.
The fancy rat (Rattus norvegicus domestica) is the domesticated form of Rattus norvegicus, the brown rat, [1] and the most common species of rat kept as a pet.The name fancy rat derives from the use of the adjective fancy for a hobby, also seen in "animal fancy", a hobby involving the appreciation, promotion, or breeding of pet or domestic animals.
The brown rat and its smaller cousins, the black rat (Rattus rattus), and the house mouse (Mus musculus), are the three most successful invasive mammals on Earth. (Coincidentally, they also have ...
A rat in a suburb of Vancouver Skeleton of a black rat (Rattus rattus) on display at the Museum of Osteology. The 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.
The albino laboratory rat with its red eyes and white fur is an iconic model organism for scientific research in a variety of fields. Laboratory rats or lab rats are strains of the rat subspecies Rattus norvegicus domestica (Domestic Norwegian rat) which are bred and kept for scientific research.
The black rat (Rattus rattus) was originally introduced from Asia to Europe by trade, but was subsequently displaced and succeeded throughout Europe by the bigger brown rat (Rattus norvegicus). The brown rat was not as prone to transmit the germ-bearing fleas to humans in large die-offs due to a different rat ecology.
A working rat is any rat which is trained for specific tasks as a working animal. In many cases, working rats are domesticated brown rats . However, other species, notably the Gambian pouched rat , have also been trained to assist humans.