Rats and Mice
Rats have become one of the most spread commensal rodent in the world, thought to have originated from China and living closely to humans they are the most successful mammal on the planet.
The fur is course and usually brown and dark grey while the belly lighter grey or brown and can live up to 2 years in the wild and longer as pets weighing about 1-2 lbs. They are mostly comprised of 2 common types known as the Roof and Norway Rats. Almost blind rodents are dependent on their keen sense of smell and touch and when in search of food and water they will follow edges of buildings. When presented with danger or need of resources they can enter through a crack or holes as small as the size of a quarter, this makes them hard for predators to find. They are very good swimmers including under water, climbing wires and poles as large as 4 inches round.
The Norway rats burrow into the ground and create tunnels and can undermine structures but can climb even into attics but prefer the ground. The Roof rat is very acrobatic and can be on ground or roof level they prefer climbing to avoid predators.
They are not so curious to new things in their environment and tend to avoid it unless under stress to find food and water. Trapping can be difficult if there is an abundance of food and if they have been stung by a trap before.
Both are omnivores eating a wide variety of foods, fish, meats, fresh fruit and nuts but are known to like seafood including mussels. Most likely they are near a food source within 400ft of their home and can find water in some the foods they consume. Both prefer to be out at night but if stressed for food and water or diseased they will be seen during daylight hours
Reproduction can be in 2 to 5 months after birth and can have litters of 6-22 depending on favorable conditions and 12 litters per year.