<P> Rats in New York City are widespread, as they are in many densely populated areas . For a long time, the number of rats in New York City was unknown, and a common urban legend was that there were up to five times as many rats as people . In 2014, however, scientists more accurately measured the entire city's rat population to be approximately only 20% of the number of humans; that is, there were approximately 2 million rats to New York's 8.4 million people at the time of the study . </P> <P> The city's rat population is dominated by the brown rat (also known as the Norway rat). The average adult body weight is 350 grams (12 oz) in males and about 250 grams (8.8 oz) in females . The adult rat can squeeze through holes or gaps the size of a quarter (0.955 inches (24.3 mm), jump a horizontal distance of up to 4 feet (1.2 m) (or vertically from a flat surface to 3 feet (0.91 m)), survive a fall from a height of almost 40 feet (12 m), and tread water for three days . </P>

How many rats are there in new york city
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