There are 56 known species of rats in the world. [1] The best-known rat species are the black rat (Rattus rattus) and the brown rat (Rattus norvegicus). This group, generally known as the Old …

Sep 17, 2025 · rat, (genus Rattus), the term generally and indiscriminately applied to numerous members of several rodent families having bodies longer than about 12 cm, or 5 inches. …

Nov 5, 2025 · While many rodents are referred to as "rats" due to similarities in appearance and behavior, not all belong to the Rattus genus. The distinction between rats and mice often …

Rats are known for their intelligence, social structures, and ability to adapt to various environments. Their behavior is a mix of instinct and learned skills, which allows them to thrive …

May 27, 2024 · Rats belong to the rodent family, which is one of the most diverse and widespread mammal groups in the world. The first rodents evolved during the Late Paleocene or Early …

Oct 8, 2025 · While Norway rats are one of the most common pests in Massachusetts, specific breeds are common in laboratories as test subjects and in homes as pets. You’ll find Norway …

There are dozens of species of rats but black rats and brown rats are the two that most commonly live among humans. What are rats? Much like dogs, though not as beloved, rats are our...

Rats are highly adaptable, medium-sized rodents belonging to the Muridae family, specifically the genus Rattus. Found on every continent except Antarctica, rats have followed human …

Jun 12, 2025 · From bustling cities to serene countrysides, the rats in the U.S. have adapted to thrive in various settings. Today, we’ll explore some of the rat species you might encounter in …

Rats are more than just a pest. Learn how these rodents fit into our ecosystem, how they have helped shape history, and other interesting facts about rats.