Dermacentor variabilis, commonly known as the American dog tick, is a species of tick found in North America. This tick is well-known for transmitting several diseases, including Rocky Mountain spotted fever and tularemia, among others. There are various synonyms used to describe this tick species, such as Dermacentor occidentalis, Dermacentor venustus, and Rhipicephalus sanguineus, depending on the scientific literature. Regardless of the name used, it is important to take precautions and preventive measures against tick bites since they pose a significant health risk for humans and animals alike. Regular tick checks, tick repellent, and exclusion of ticks from your surroundings are highly recommended.