They are also found in agricultural areas, such as in barns and crop fields. In urban areas they prefer to live in dry upper levels of buildings, so they are commonly found in wall cavities and false ceilings. Rats will eat nearly any type of food, but they prefer high-quality foods such as meat and fresh grain.
Rats require 1/2 to 1 fluid ounce of water daily when feeding on dry food so are often found close to water sources. Rats have keen taste, hearing and sense of smell. They will climb to find food or shelter, and they can gain entrance to a building through any opening larger than 1/2 inch across. The black rat, along with the brown rat, is one of the most widespread animal species in the world.