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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. It weighs between 140 and 500 g (4.9 and 17.6 oz). Thought to have originated in northern China and neighbouring areas, this rodent has now spread to all continents except ...
Jun 19, 2021 · Map indicating the assumed native distribution of Rattus norvegicus (in blue) and locations of major rat domestication processes (marked with depictions). From East to West: Hooded rat depiction adapted from an image within the 1700s Japanese rodent breeding guide book, the Chinganso-date-gusa (1787); Rat-baiting dog depiction adapted from Mayhew (1851)London labor and the London poor illustrating blood sport activities from which European domestic rats arose; laboratory rat silhouette ...
Jun 14, 2024 · Brown rat, (Rattus norvegicus), species of rat (family Muridae) found on every continent except Antarctica. The alternate name “Norway rat” came from a false hypothesis widely believed in 18th-century England that the rats were native to Norway. Research has confirmed, however, that the brown rat
Geographic Range. Norway rats (Rattus norvegicus) are originally native to northern China.Following a series of introductions, the species had found its way to Eastern Europe by the early eighteenth century.
R. norvegicus probably arrived in Europe in the middle ages and certainly by the early 1700s, and from there hitch-hiked around the world on boats, leading to accidental introductions to the Americas, Australia and Africa, as well as to island groups.It is currently found in 36% of the world’s island groups (Atkinson, 1985).Once an island group is colonised R. norvegicus is able to colonise throughout the archipelago rapidly through further hitch-hiking and natural dispersal, including ...
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 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.While less commonly used for research than laboratory mice, rats have served as an important animal model for research in psychology and biomedical science.
The brown rat has a bad reputation, but it mostly lives side-by-side with us without any problems. It can be seen in any habitat.
Native to China and Mongolia, the brown rat (Rattus norvegicus) now enjoys a worldwide distribution.While black rats and the house mouse tracked the regional development of human agricultural settlements, brown rats did not appear in Europe until the 1500s, suggesting their range expansion was a response to relatively recent increases in global trade.
Quick Facts Recognition: Greyish-brown fur; prominent pointed muzzle, eyes, ears and long, almost naked, tail, about as long as the head-and-body. Much larger than any mice, but comparable with the much darker, shorter-tailed Water
