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. …

Jul 28, 2025 · While many people are familiar with the common brown or black rats, there are actually dozens of distinct species, each with its own characteristics, behaviors, and ecological …

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 …

Jun 26, 2025 · Rats are more than just the creatures we glimpse in city alleys—they come in many fascinating types, from sleek black climbers to curly-coated pets and swamp-dwelling …

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...

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 …

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 …

Apr 27, 2023 · Rats are generally larger, with longer, thinner bodies and long legs. Here's everything you need to know about rats, their habitats, behaviors and more. How big can rats …

Rats are various medium sized rodents, similar in appearance to mice, but larger. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus …