The term "reptilian" refers to a category of cold-blooded vertebrates that includes animals such as snakes, lizards, turtles, and crocodiles. These creatures are characterized by their scaly skin, which helps them retain moisture, and their ability to regulate body temperature through external means. Reptilians are found in various habitats around the world, from deserts to forests. In popular culture, "reptilian" is often associated with conspiracy theories suggesting that shape-shifting reptilian aliens, sometimes referred to as reptoids, secretly control human societies. These theories lack scientific evidence and are considered pseudoscientific. Nonetheless, the idea has gained traction in various media and discussions.