Hello, I'm an expert in mammalian biology with a focus on rodents. When describing the appearance of a rat, it's important to note that there are different species, but I'll provide a general description.

A rat is a medium-sized rodent with a slender body, a pointed snout, small round ears, and a long, hairless tail. They have sharp incisors that are constantly growing and need to be worn down by gnawing. Their fur is typically brown or gray, but can vary in color depending on the species and environment. Rats are also known for their quick, nimble movements and keen senses, which include a strong sense of smell.

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Rats have fur that is more prevalent on the body than on the ears and tail. They run on four legs and are capable of standing upright on their two back legs. Size, color, tail length, ear size and fur texture typically differ among rat species. Norway rats are large and rotund, while roof rats are long and slender.read more >>