Old World Rats (Genus Rattus)

The genus Rattus consists of medium- to large-sized rodents commonly known as rats, belonging to the family Muridae. Species in this genus are characterized by slender bodies, long scaly tails that are usually as long as or longer than the body, prominent ears, and sharp incisors adapted for gnawing.

Members of Rattus are highly adaptable and occupy a wide range of habitats, including forests, grasslands, agricultural areas, and human settlements. Many species are omnivorous, feeding on seeds, fruits, insects, and various organic materials. Some species have become successful commensal animals living alongside humans and are widely distributed across the world through human transportation.

The genus includes well-known species such as Rattus rattus and Rattus norvegicus, which are among the most widespread mammals globally. Ecologically, species of Rattus play important roles as seed predators and prey for many predators, though some are also considered agricultural pests or carriers of diseases.