Spotted Racer
Coluber constrictor • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Coluber, Species: C. constrictor
Widespread throughout North America, ranging from southern Canada, across most of the United States, and down into parts of Mexico.
Look up Spotted Racer in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Colubrinae, Genus: Coluber, Species: C. constrictor
Conservation
Least Concern according to the IUCN Red List, though local populations face threats from habitat fragmentation, road mortality, and agricultural development.
Physical Description
Slender body with smooth scales, a distinct head that is slightly wider than the neck, large eyes with round pupils, and a greyish or brownish base color marked with darker dorsal blotches or spots.
Size & Dimensions
Estimated specimen length is approximately 60 to 90 cm, representing a subadult or small adult. Typical adult size ranges from 90 to 150 cm, with a maximum recorded length exceeding 180 cm.
Habitat
Highly adaptable, found in a wide variety of open and semi-open habitats including prairies, fields, brushlands, open woodlands, and agricultural areas, from sea level to over 2,000 meters elevation.
Diet & Feeding
Active diurnal forager with a broad diet consisting of insects, frogs, lizards, birds, rodents, and other small snakes, captured and subdued by pinning or constriction.
Reproduction
Oviparous species that mates in spring, with females laying clutches of 3 to 30 eggs in underground burrows, rotting logs, or beneath rocks during early summer.
Look-alikes
Frequently confused with gopher snakes (Pituophis catenifer) and young rat snakes (Pantherophis spp.), but can be distinguished by its slender build, smooth scales, and lack of keeled scales.
Conservation Status
Least Concern according to the IUCN Red List, though local populations face threats from habitat fragmentation, road mortality, and agricultural development.
Cultural Significance
Plays an important ecological role as a natural predator of agricultural pests like rodents and insects, though frequently misunderstood due to its active movements and defensive behaviors.
Notable Features
Known for exceptional daytime visual acuity and rapid movement when startled, often vibrating the tail rapidly in dry leaf litter to produce a buzzing sound that mimics rattlesnakes.