Which variety of rat is most common in urban environments in the US?

The brown rat, also known scientifically as Rattus norvegicus, is the most common rat species found in urban environments in the United States. This species thrives in human-populated areas due to its adaptability to various habitats, particularly those involving stored food and waste, which provide ample food sources. Brown rats are also known for their robust size and preference for burrowing, which allows them to easily establish colonies in buildings, sewers, and underground areas.

Their omnivorous diet and quick reproductive rate further contribute to their success in urban settings, leading to significant populations in cities. Additionally, their ability to survive in harsh environments and their resistance to certain control measures bolster their presence in human populations. Understanding the prevalence of the brown rat is crucial for effective pest management and public health strategies aimed at controlling rodent populations in urban areas.