![]() Dogs and feral house cats are known to kill and/or harass juvenile blue racers. Probable natural predators of adult blue racers include the larger birds of prey (e.g., red-tailed hawk, northern harrier, great horned owl) and carnivorous mammals such as raccoons, foxes, and coyotes. Adults engage in both terrestrial and arboreal foraging. Campbell and Perrin also noted that racers were among the first snakes to disappear from suburban areas.īlue racers are active foragers.The younger snakes may consume crickets and other insects, whereas adults feed primarily on rodents, songbirds, and snakes. Therefore, blue racers are more confined to areas with minimal anthropogenic activity. In contrast to blue racers, fox snakes were often found under front porches, in barns/garages, and in the foundations of houses whereas, most (but not all) blue racers were observed in more "natural" settings. Evidence to suggest this comes largely from radio telemetry data from both blue racers and eastern fox snakes that inhabited the same general areas on Pelee Island (although studies were not conducted concurrently). Behavior/Adaptabilityīlue racers seem to be relatively intolerant of high levels of human activity and for most of the active season they remain in areas of low human density. flaviventris (the yellow-bellied racers), most recent authorities agree that the subspecies C.c. Although there has been some controversy regarding the designation of C.c. The largest documented specimen captured on Pelee Island was 138 cm SVL. The blue racer is one of Ontario's largest snakes, reaching 90 cm to 152 cm snout-to-vent length (SVL). Unlike adults, hatchlings and yearlings (first full active season) have dorsal blotches that fade completely by the third year however, juvenile patterning is still visible on the venter until late in the snake's third season. They also have characteristic black masks, relatively large eyes, and often have brownish-orange rostral scales (snouts). Descriptionīlue racers often have creamy white ventral scales, dull grey to brilliant blue lateral scales, and pale brown to dark grey dorsums. On Pelee Island in Ontario, the blue racer is restricted to the eastern two thirds of the island. ![]() The last reliable record of the blue racer on mainland Canada was in Ontario in 1983. Western South Dakota has a thriving population of Blue Racers though. In the United States: Ohio, Indiana, Illinois, Michigan, Wisconsin, Oregon, Washington, South Dakota and Iowa are now the only states with extant populations of blue racer. It is likely that a mosaic of these habitats is required to fulfill the ecological needs of C. Blue racers prefer open and semi-open habitat, savanna, old field shoreline, and edge habitats.
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