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Other rat genera include Neotoma (pack rats), Bandicota (bandicoot rats) and Dipodomys (kangaroo rats). Rats are typically distinguished from mice by their size. Usually the common name of a large muroid rodent will include the word "rat", while a smaller muroid's name will include "mouse".
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 ...
Its head and body length is 41–45 cm (16–17.5 in) and its tail length is 33–70 cm (13–27.5 in). These dimensions are about twice as large as those of a typical brown rat (Rattus norvegicus), which suggests about eight times the body mass. The body mass has been estimated at 1.2–2.5 kilograms (2.6–5.5 lb), comparable to a rabbit. [3]
Rattus is a genus of muroid rodents, all typically called rats. However, the term rat can also be applied to rodent species outside of this genus. Species and ...
One form of midden analysis examined the size of fecal pellets in pack rat middens. [17] The size of woodrat pellet is proportional to the size of the woodrat. By measuring the pellets, the approximate size of the woodrat was determined based on data from a study of field-trapped woodrats.
The eastern woodrat is a rodent of medium size, with an average length of 21.2 centimetres (8.3 in) and weight of 245 grams (0.540 lb), [3] but grows up to 17 inches (43 cm) long. [5] The body is short and stocky and the tail is exceptionally long (15–20 centimetres (5.9–7.9 in)).
Kangaroo rats inhabit overlapping home ranges. These home ranges tend to be small with most activities within 200–300 ft and rarely 600 ft. [4] Home range size can vary within species with Merriam's kangaroo rats having larger home ranges than banner-tailed kangaroo rats. Recently weaned kangaroo rats move into new areas not occupied by adults.
The woolly giant rat is an exceptionally large rat, the largest living species of sigmodontine rodent, with short limbs and powerful claws. Nonetheless, individuals vary considerably in size, ranging from 19 to 29 cm (7.5 to 11.4 in) in head-body length, with a relatively short tail 15 to 20 cm (5.9 to 7.9 in) long.