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Size of this PNG preview of this SVG file: 669 × 600 pixels. ... Comparison of the physique of a black rat (Rattus rattus) with a brown rat (Rattus norvegicus) Date:
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 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 black rat was present in prehistoric Europe and in the Levant during postglacial periods. [9] The black rat in the Mediterranean region differs genetically from its South Asian ancestor by having 38 instead of 42 chromosomes. [10] Its closest relative is the Asian house rat (R. tanezumi) from Southeast Asia. The two diverged about 120,000 ...
It is white with a strongly contrasting glossy-black cap, back and band down towards its forelimbs. Its long fur is dense and coarse, but not spiny, as in some other members of its family. Specimens often have brown (rather than black) markings, but as far as it is known this is caused by fading and does not occur in the living animals.
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.
An elderly black mouse who is one of the Watterson family. Max Guinea pig: Bionic Max: The world's first bionic Guinea Pig. Maisy Mouse Maisy: A white mouse who lives in an orange house with a red roof and who is the main character. Marion: Hamster Bounty Hamster: Voiced by Alan Marriott. A small blue galactic bounty hunting hamster, who ...
The Himalayan field rat (Rattus nitidus), sometimes known as the white-footed Indo-Chinese rat, is a species of rodent in the family Muridae.It has a wide range, being found in India, Bangladesh, Nepal, Bhutan, China, Myanmar, Laos, Thailand, and Vietnam, with introduced populations in Indonesia (widely), Palau, and the Philippines.