The real-life roadrunner is a large, ground-dwelling bird native to North and Central America, belonging to the cuckoo family (Cuculidae). There are two species: the greater roadrunner (Geococcyx californianus), found in the southwestern United States and parts of Mexico, and the lesser roadrunner (Geococcyx velox), which inhabits regions further south into Mexico and Central America. Unlike the cartoon version, the real roadrunner is not blue with a bright crest; it has brown upperparts with black streaks, a buff breast with dark streaks, and a white belly, with a distinctive shaggy black crest on its head.
The bird is built for speed on the ground, capable of running up to 20–30 km/h (12–19 mph), with a top recorded speed of 42 km/h (26 mph), making it the fastest running bird among those capable of flight. It uses its long, powerful legs and long tail for balance and maneuverability while running, often darting through desert scrub and open terrain. Despite being able to fly, roadrunners rarely do so, preferring to run and relying on their speed and agility to escape predators or catch prey.