Rhipicephalus sanguineus, commonly known as the brown dog tick, is a species of tick that primarily infests dogs but can also bite humans and other animals. This tick is found worldwide, especially in warm climates, and is known for its ability to thrive indoors, making it a common pest in households with pets. The brown dog tick is a vector for several diseases, including Ehrlichiosis and Babesiosis, which can affect both dogs and humans. Its life cycle includes four stages: egg, larva, nymph, and adult, with each stage requiring a blood meal to develop. Regular tick prevention is essential for pet owners to protect their animals and themselves.