They eat more meat than the Black rat, and if they get the opportunity, they will eat carrion and will prey on other animals. They frequently infest public tips, slaughterhouses, domestic dwellings, warehouses, shops, supermarkets, in fact anywhere there is an easy meal and potential nesting sites.
Brown rats, or Norway rats (Rattus norgevicus) are predominantly nocturnal, although some can be spotted during the day in highly populated areas. They are considered to be the most successful mammal after humans and in fact can be found everywhere that humans live. They are the only species found in sewers in Zimbabwe, they are great swimmers but poor climbers, unlike the Black rat. Their diet is extremely broad, and they will eat almost anything that is edible, with a food preference for grain.