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The Polynesian rat, Pacific rat or little rat (Rattus exulans), or kiore, is the third most widespread species of rat in the world behind the brown rat and black rat.Contrary to its vernacular name, the Polynesian rat originated in Southeast Asia, and like its relatives has become widespread, migrating to most of Polynesia, including New Zealand, Easter Island, and Hawaii.
It is difficult to determine the extent of their home range because they do not utilize a whole area but rather use regular runways to get from one location to another. [69] There is great debate over the size of the population of rats in New York City, with estimates from almost 100 million rats to as few as 250,000. [70]
In addition, brown rats eat a wider variety of foods, and are more resistant to weather extremes. [ 17 ] Black rat populations can increase exponentially under certain circumstances, perhaps having to do with the timing of the fruiting of the bamboo plant, and cause devastation to the plantings of subsistence farmers; this phenomenon is known ...
To help combat the problem, a Chicago animal shelter has placed more than 1000 feral cats (sterilized and vaccinated) outside of homes and businesses since 2012, where they hunt and catch rats while also providing a deterrent simply by their presence. [51] Rats have the ability to swim up sewer pipes into toilets.
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.
Litter size is typically 3 to 12 pups; the average litter size is 11-12 [58] [65] [66] The young are born blind and weigh about 2 grams (0.07 oz). The queen nurses them for the first month, after which the other members of the colony feed them fecal pap until they are old enough to eat solid food.
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)).
It is a medium size for its genus at 277 to 300mm in total length and an average weight of 67.26g. Its tail length is 164 to 180mm, which puts the tail about 1.45 times the length of the body. The color is described as being bicolored with tan to dark brown on the dorsal side and white on the ventral side.
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