Search results
Results from the WOW.Com Content Network
The black rat (Rattus rattus), also known as the roof rat, ship rat, or house rat, is a common long-tailed rodent of the stereotypical rat genus Rattus, in the subfamily Murinae. [1] It likely originated in the Indian subcontinent, but is now found worldwide. [2] The black rat is black to light brown in colour with a lighter underside.
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.
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.
Several species recently lived wild in Pennsylvania, but are now extirpated (locally, but not globally, extinct). They are the marsh rice rat (Oryzomys palustris), eastern wolf (Canis lycaon), American marten (Martes americana), wolverine (Gulo gulo), cougar (Puma concolor), Canada lynx (Lynx canadensis), moose (Alces alces), and bison (Bison ...
This includes a few species, such as the black-tailed jackrabbit and red deer, that were introduced after the arrival of Europeans. It also includes the extinct Caribbean monk seal and Florida black wolf. Rodents account for roughly one quarter of all species, followed closely by mammals from the families Cetacea and Carnivora.
Species in this list are grouped by order and then by family within each order. The common name for each species is followed by its binomial name. The following codes are used to designate some species: EN - Species is listed as endangered by the IUCN. NT - Species is listed as near threatened by the IUCN.
Researchers then traced changes in genome from species to species, backward through time, to reconstruct the likely genome of the common ancestor of all mammals. ... a small rodent-like animal ...
Rodents are animals that gnaw with two continuously growing incisors. Forty percent of mammal species are rodents, and they inhabit every continent except Antarctica. This list contains circa 2,700 species in 518 genera in the order Rodentia. [1]