The Brown Dog Tick (Rhipicephalus sanguineus) is a common ectoparasite that primarily infests dogs but can also bite humans. This tick is reddish-brown in color and can be identified by its flat, oval shape. It thrives in warm climates and is often found in homes, kennels, and yards, making it a significant concern for pet owners. These ticks are known for transmitting various diseases, including Rocky Mountain spotted fever and canine ehrlichiosis. They can complete their life cycle indoors, which allows them to remain active year-round. Regular tick prevention and control measures are essential to protect pets and reduce the risk of tick-borne illnesses.