The Brown Rat (Rattus norvegicus) is a common rodent found worldwide, often living in urban areas. It has a robust body, a long tail, and can weigh between 350 to 450 grams. Brown rats are known for their adaptability and can thrive in various environments, including sewers and buildings. These rats are primarily nocturnal and are omnivorous, feeding on a wide range of foods. They are social animals, often living in large groups. Due to their close association with humans, they can be carriers of diseases, making them a concern for public health and sanitation efforts related to pest control.