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Rat - Wikipedia
Types of Rats: The Most Common Rat Species - A-Z Animals
What are the different species of rats - 64 rat species
51 Different Types of Rats - NatureNibble
Rat | Rodent Species, Habitats & Characteristics | Britannica
Brown rat - Wikipedia
Rattus - Wikipedia
Rats: Facts about these thin-tailed, medium-size rodents
Rat Species Spotlight: Diversity and Traits - Rodent Animal
Rats - National Geographic