Masticophis flagellum is commonly known as the coachwhip snake, a sleek and agile reptile found in western and southern United States. Other synonyms for Masticophis flagellum include the whip snake, red racer, and red whip snake. These snakes are non-venomous and can grow up to 8 feet long. They are known for their impressive speed and agility, often darting through fields and forests in search of prey. Coachwhip snakes feed on small mammals like rodents, lizards, and birds. They have a distinct appearance, with a slender body and smooth scales that can range from red to tan. These fast and fascinating creatures are a fascinating part of the American wildlife.