Rat

Rats are medium-sized, long-tailed rodents, most often referring to members of the genus *Rattus* in the family Muridae.

Rats are medium-sized, long-tailed rodents, most often referring to members of the genus *Rattus*. The best-known species are the black rat and the brown rat, both closely associated with human settlements.

What it is

In scientific usage, a rat usually refers to a medium-sized rodent in the genus *Rattus*, within the family Muridae. The best-known species are the black rat (*Rattus rattus*) and the brown rat (*Rattus norvegicus*). Some animals commonly called rats are not in this genus.

Where it lives and what it eats

Rats are highly adaptable and often live near human settlements, especially in urban and agricultural environments. They are omnivorous, eating both plant and animal matter, and are capable climbers, burrowers, and gnawers.

Why it matters to humans

Rats have a mixed relationship with people. They can be pests that damage food stores and spread diseases, but they are also important in scientific research and are kept as pets in domesticated forms. In Canada, brown rats and black rats are established in cities and agricultural areas.