The Brown Dog Tick (Rhipicephalus sanguineus) is a common ectoparasite that primarily infests dogs but can also bite humans. These ticks are reddish-brown in color and can be identified by their flat, oval shape. They thrive in warm climates and are often found in homes, kennels, and outdoor areas where dogs frequent. Brown dog ticks are known for transmitting various diseases, including Rocky Mountain spotted fever and canine ehrlichiosis. They have a unique life cycle that includes four stages: egg, larva, nymph, and adult. Proper pet care and regular tick prevention measures can help control their population and reduce the risk of disease transmission.