Racer
Coluber constrictor • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Coluber, Species: C. constrictor
Widely distributed throughout North America, ranging from coast to coast in the United States, extending north into southern Canada, and south through parts of Mexico.
Look up Racer in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Coluber, Species: C. constrictor
Conservation
IUCN Red List status is Least Concern. Widespread and generally abundant, though local populations can face threats from habitat fragmentation, road mortality, and intentional killing.
Physical Description
The juvenile specimen pictured exhibits a greyish-brown ground color with a series of distinct darker blotches or saddles along the back and sides. As they mature, most subspecies lose this patterned juvenile look and turn solid or uniform in color (grey, brown, olive, or black). It has a slender body, a distinct head that is wider than the neck, large eyes with round pupils, and keeled or weakly keeled scales depending on developmental stage and subspecies.
Size & Dimensions
Estimated specimen length is around 24 to 36 inches (juvenile); adults typically range from 20 to 60 inches (50 to 152 cm) in total length.
Habitat
Highly adaptable, found in a diverse range of habitats including open fields, prairies, brushlands, desert edges, pine barrens, and the margins of forests. Prefers areas with low vegetation for easy movement.
Diet & Feeding
Diet consists of a wide variety of prey including insects, frogs, toads, lizards, snakes, birds, and small mammals. They are active diurnal foragers that actively hunt and capture prey using speed and pinning rather than constriction.
Reproduction
Oviparous species. Females typically lay clutches ranging from 3 to 30 eggs in underground burrows, rotting logs, or beneath rocks during late spring or early summer. Eggs incubate for about 60 days before hatching in late summer.
Conservation Status
IUCN Red List status is Least Concern. Widespread and generally abundant, though local populations can face threats from habitat fragmentation, road mortality, and intentional killing.
Cultural Significance
Play an important ecological role in controlling populations of rodents and insects. In rural folklore, they are sometimes known as 'black racers' or 'farmer's friends' due to their utility in pest management around agricultural lands.
Notable Features
Known for exceptional speed and agility when fleeing from predators. Juveniles retain a heavily blotched pattern that completely fades into a uniform coloration as they reach adulthood.