The Masticophis flagellum piceus, commonly known as the Red Racer or Coachwhip, is a slender, fast-moving snake found in the arid deserts of the southwestern United States and northern Mexico. It is known for its striking reddish coloration and impressive speed, which it uses to hunt lizards, rodents, and other small prey. The Red Racer is diurnal, meaning it is most active during the day, and is often seen basking in the sun or swiftly navigating through shrubs and open terrain. This snake plays a crucial role in controlling the populations of its prey species, maintaining ecological balance in its habitat.

Masticophis flagellum piceus, commonly known as the Red Racer or Red Coachwhip, is native to the southwestern United States and parts of northwestern Mexico. Its geographical distribution includes states such as Arizona, California, Nevada, New Mexico, Texas, and extends into the Baja California Peninsula and Sonora in Mexico.

The Red Racer typically inhabits arid and semi-arid regions characterized by desert, scrubland, and open woodland environments. These areas often experience hot, dry climates with sparse vegetation, including cacti, shrubs, and occasional trees. The species is well-adapted to sandy or rocky substrates, which facilitate its burrowing and hunting behaviors.

Masticophis flagellum piceus occupies a niche as a diurnal predator, primarily feeding on small mammals, birds, lizards, and other snakes. Its slender, agile body allows it to navigate quickly through its environment, making it an effective hunter. The species plays a role in controlling the populations of its prey, contributing to the ecological balance of its native habitats.