Search results
Results from the WOW.Com Content Network
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. Rats are bigger than most Old World mice, which are their relatives, but seldom weigh over 500 grams (17 + 1 ⁄ 2 oz) in the wild. [2]
Brown rats live in large, hierarchical groups, either in burrows or subsurface places, such as sewers and cellars. When food is in short supply, the rats lower in social order are the first to die. If a large fraction of a rat population is exterminated, the remaining rats will increase their reproductive rate, and quickly restore the old ...
They do cluster together in some feeding situations. Groups of kangaroo rats that exist are aggregations and colonies. [4] There appears to be a dominance hierarchy among male kangaroo rats in competition for access to females. [17] Male kangaroo rats are generally more aggressive than females and are more dominant over them.
Reports of rats in Tri-Cities neighborhood groups seem to be mostly outdoor sightings. But roof rats are climbers and can get into houses through attic and other vents, and Norway rats might be ...
According to M&M Pest Control, based in the tri-state area, approximately 3 million rats live in New York City, with most being of the Norway species or what is commonly referred to as the brown rat.
Rat infestations have increased as a result of budget reductions and more wasteful disposal of food. Rats burrow underground or create nests in suitable soft material, with a small group of rats in each nest. [8] Brown rats in New York City prefer to live at ground level or basement level. [20] They congregate in colonies of 30 to 50 rats.
New York City hired its first-ever "Rat Czar" in 2023, and an investigation by CBS New York found rats had an increase of more than 7% since the Adams administration took office in 2022 and ...
Naked mole-rats can live longer than any other rodent, with lifespans in excess of 37 years; the next longest-lived rodent is the African porcupine at 28 years. [ 38 ] [ 39 ] [ 40 ] The mortality rate of the species does not increase with age, and thus does not conform to that of most mammals (as frequently defined by the Gompertz-Makeham law ...