Eastern racer

Last updated

Eastern racer
Coluber constrictor anthicus.jpg
Coluber constrictor anthicus ,
buttermilk racer
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Genus: Coluber
Linnaeus, 1758
Species:
C. constrictor
Binomial name
Coluber constrictor
Coluber constrictor distribution.png
Synonyms [2] [3]

The eastern racer, or North American racer (Coluber constrictor), is a species of nonvenomous snake in the family Colubridae. The species is endemic to North America and Central America. Eleven subspecies, including the nominotypical subspecies, are recognized, which as a group are commonly referred to as the eastern racers. The species is monotypic in the genus Coluber.

Contents

Geographic range

C. constrictor is found throughout much of the United States, on both sides of the Rocky Mountains, but it also ranges north into Canada and south into Mexico, Guatemala, and Belize.

Description

Adult eastern racers can typically vary from 50 to 152 cm (20 to 60 in) in total length (including tail) depending on the subspecies, but a record-sized specimen measured 185.4 cm (73.0 in) in total length. [4] [5] [6] A typical adult specimen will weigh around 556 g (1.226 lb), with little size difference between the sexes. [7] The patterns vary widely among subspecies. Most are solid-colored as their common names imply: black racers, brown racers, tan racers, blue racers, or green racers. "Runner" is sometimes used instead of "racer" in their common names. All subspecies have a lighter-colored underbelly: white, light tan, or yellow in color. Juveniles are more strikingly patterned, with a middorsal row of dark blotches on a light ground color. The tail is unpatterned. As they grow older, the dorsum darkens and the juvenile pattern gradually disappears. [4]

Behavior

Closeup of head of C. c. mormon, western yellow-bellied racer Coluber constrictor mormon -- closeup of face, side.jpg
Closeup of head of C. c. mormon, western yellow-bellied racer

The eastern racers are fast-moving, highly active, diurnal snakes. Their diet consists primarily of small rodents, other mammals (as large as small cottontail rabbits), frogs, toads, small turtles, lizards, and other snakes. [8] [9] Some subspecies are known to climb trees to eat eggs and young birds. Juveniles often consume soft-bodied insects and other small invertebrates, [10] as well as small frogs, small reptiles (including lizards and snakes and their eggs), young rodents, and shrews. [9] Despite their specific name, constrictor, they do not really employ constriction, instead simply subduing struggling prey by pinning it bodily, pressing one or two coils against it to hold it in place instead of actually suffocating it. Most smaller prey items are simply swallowed alive.

They are curious snakes with excellent vision and are often seen raising their heads above the ground to get a better view of their surroundings, a behavior dubbed "periscoping" by snake enthusiasts. Aptly named, racers are very fast and typically flee from a potential predator. However, once cornered, they put up a vigorous fight, biting hard and often. They are difficult to handle and will writhe, defecate, and release a foul-smelling musk from their cloacae. Vibrating their tails among dry leaves, racers can sound convincingly like rattlesnakes. [11]

Habitat

C. constrictor is found frequently near water, but also in brush, trash piles, roadsides, and swamps, and in suburbia; it is the most common snake in residential neighborhoods in Florida. It spends most of its time on the ground, but it is a good tree climber and may be found in shrubs and trees where bird nests can be raided for eggs and chicks, as well as small adult birds such as finches, canaries, and thrashers.

Most of the eastern racers prefer open, grassland-type habitats where their keen eyesight and speed can be readily used, but they are also found in light forest and even semiarid regions. They are usually not far from an area of cover for hiding.

Reproduction

In C. constrictor, mating takes place in the spring from April until early June. Around a month later, the female lays three to 30 eggs in a hidden nest site, such as a hollow log, an abandoned rodent burrow, or under a rock. The juveniles hatch in the early fall. A newborn is 8–10 in (20–26 cm) in total length. Maturity is reached around 2 years old. Eastern racers have been known to lay their eggs in communal sites, where a number of snakes, even those from other species, all lay their eggs together.

Symbol

The northern black racer is the state reptile of Ohio. [12]

Subspecies

Closeup of the head of Coluber constrictor constrictor, northern black racer Coluber constrictorPCCP20030612-1115B.jpg
Closeup of the head of Coluber constrictor constrictor, northern black racer

Related Research Articles

<i>Pantherophis obsoletus</i> Species of snake

Pantherophis obsoletus, also known commonly as the western rat snake, black rat snake, pilot black snake, or simply black snake, is a nonvenomous species of snake in the family Colubridae. The species is native to central North America. There are no subspecies that are recognized as being valid. Its color variations include the Texas rat snake. Along with other snakes of the eastern United States, like the eastern indigo snake and the eastern racer, it is called “black snake”.

<span class="mw-page-title-main">Hardwicke's rat snake</span> Species of snake

Hardwicke's rat snake, also known commonly as the glossy-bellied racer, Gray's rat snake, and the spotted bellied snake, is a species of snake in the family Colubridae. The species is native to Asia. There are three recognized subspecies.

<i>Coluber constrictor flaviventris</i> Subspecies of snake

Coluber constrictor flaviventris, commonly known as the eastern yellow-bellied racer, is a subspecies of the eastern racer, non-venomous colubrid snake. It is endemic to North America.

<i>Cemophora coccinea</i> Species of snake

Cemophora coccinea, commonly known as the scarlet snake, is a species of nonvenomous snake in the family Colubridae. The species is native to the southeastern United States. There are two subspecies of C. coccinea that are recognized as being valid. The Texas scarlet snake was previously considered a subspecies.

<span class="mw-page-title-main">Southern black racer</span> Subspecies of snake

The southern black racer is one of the more common subspecies of the nonvenomous Coluber constrictor snake species of the Southeastern United States. The subspecific name priapus refers to the proximal spines of the hemipenes being much enlarged into basal hooks, which is characteristic of this subspecies. These snakes are quite active during the day, which increases the chance of sightings. They eat almost any animal they can overpower, including rodents, frogs, toads, and lizards. Members of this species generally do not tolerate handling – even after months in captivity – and typically strike and flail wildly every time they are handled, often defecating a foul-smelling musk, a common defense against predators in snakes. Adults of the species are usually thin with a jet-black dorsal side with a grey belly and white chin. They are quite fast, giving them the name "racer".

<i>Coluber constrictor oaxaca</i> Subspecies of snake

Coluber constrictor oaxaca, commonly known as the Mexican racer, is a nonvenomous colubrid snake, a subspecies of the eastern racer.

Coluber constrictor etheridgei, commonly known as the tan racer, is a subspecies of nonvenomous snake in the family Colubridae, a subspecies of the eastern racer. The subspecies is native to the southern United States.

<i>Pantherophis emoryi</i> Species of snake

Pantherophis emoryi, commonly known as the Great Plains rat snake, is a species of nonvenomous rat snake in the family Colubridae. The species is native to the central part of the United States, from Missouri to Nebraska, to Colorado, south to Texas, and into northern Mexico.

<i>Pantherophis bairdi</i> Species of snake

Pantherophis bairdi is a species of harmless snake in the family Colubridae. The species is native to the southwestern United States and adjacent northeastern Mexico. No subspecies are recognized as being valid.

<span class="mw-page-title-main">Mud snake</span> Species of snake

The mud snake is a species of nonvenomous, semiaquatic, colubrid snake endemic to the southeastern United States.

<span class="mw-page-title-main">Crayfish snake</span> Species of snake

The crayfish snake, also known commonly as the glossy crayfish snake, the glossy swampsnake, the glossy water snake, and the striped water snake, is a species of semiaquatic snake in the subfamily Natricinae of the family Colubridae. The species is endemic to the southeastern United States, and preys mainly on crayfish.

<span class="mw-page-title-main">Southern hognose snake</span> Species of snake

Heterodon simus, commonly known as the southern hog-nosed snake, is a harmless snake species endemic to the southeastern United States. No subspecies are currently recognized.

<i>Farancia erytrogramma</i> Species of reptile

Farancia erytrogramma is a species of large, nonvenomous, highly amphibious colubrid snake, endemic to the coastal plains of the southeastern United States. Two subspecies are recognized as being valid, one of which has been declared extinct.

<span class="mw-page-title-main">Striped whipsnake</span> Species of snake

The striped whipsnake is a species of nonvenomous snake in the family Colubridae. It is closely related to the California whipsnake. The striped whipsnake is native to the western United States and adjacent northern Mexico.

<i>Diadophis punctatus edwardsii</i> Subspecies of snake

Diadophis punctatus edwardsii, commonly known as the northern ringneck snake, is a subspecies of Diadophis punctatus, a snake in the family Colubridae. The subspecies is endemic to North America.

<i>Coluber constrictor foxii</i> Subspecies of snake

Coluber constrictor foxii, commonly known as the blue racer, is a subspecies of Coluber constrictor, a species of nonvenomous, colubrid snake commonly referred to as the eastern racer.

<span class="mw-page-title-main">Eastern rat snake</span> Species of snake

Pantherophis alleghaniensis, commonly called the eastern rat snake, is a species of non venomous snake in the family Colubridae. The species is endemic to North America.

<span class="mw-page-title-main">Eastern milk snake</span> Subspecies of snake

Lampropeltis triangulum triangulum, commonly known as the eastern milk snake or eastern milksnake, is a subspecies of the milk snake. The nonvenomous, colubrid snake is indigenous to eastern and central North America.

<span class="mw-page-title-main">Western yellow-bellied racer</span> Subspecies of snake

The western yellow-bellied racer, also known as the western yellowbelly racer or western racer, is a snake subspecies endemic to the Western United States, including California, Oregon, Idaho, Nevada, New Mexico, Utah, Montana and Colorado. It is a subspecies of the eastern racer. It is nonvenomous and is recognized by its long and very slender shape. It is visually similar to the eastern yellow-bellied racer, which is also green, blue or brown with a recognizable yellow underside. Also named for its color, the western yellow-bellied racer is also gray with red or brown blotches when young.

<span class="mw-page-title-main">Northern black racer</span> Subspecies of snake

The northern black racer is a subspecies of the eastern racer, a nonvenomous snake in the family Colubridae. Their geographic range extends from southern Maine to northern Georgia and westward to central Kentucky and eastern Ohio. Their occupancy is dependent on the availability of large patches of open habitats.

References

  1. Hammerson, G.A.; Acevedo, M.; Ariano-Sánchez, D.; Johnson, J. (2013). "Coluber constrictor". IUCN Red List of Threatened Species . 2013: e.T63748A3128579. doi: 10.2305/IUCN.UK.2013-2.RLTS.T63748A3128579.en . Retrieved 19 November 2021.
  2. Stejneger L, Barbour T (1917). A Check List of North American Amphibians and Reptiles. Cambridge, Massachusetts: Harvard University Press. 125 pp. (Coluber constrictor, p. 79)
  3. "Coluber constrictor ". The Reptile Database. www.reptile-database.org.
  4. 1 2 Conant, Roger (1975). A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Boston: Houghton Mifflin. xviii + 429 pp. + Plates 1-48. ISBN   0-395-19977-8 (paperback). (Coluber consrictor constrictor, pp. 178-179 + Plate 26 + Map 139).
  5. "Species profile: Minnesota DNR". Dnr.state.mn.us. Retrieved 31 May 2013.
  6. "Southern Black Racer, Racer (Florida Museum)". Flmnh.ufl.edu. Retrieved 31 May 2013.
  7. Carfagno, Gerardo L. F. (2007). Habitat Use and Thermal Ecology of Ratsnakes (Elaphe Obsoleta) and Racers ... - Gerardo L. F. Carfagno - Google Books. ISBN   9780549341376 . Retrieved 31 May 2013.
  8. "Corkscrew's common snakes: Black Racer (Coluber constrictor priapus)". Corkscrew Swamp Sanctuary. Retrieved 31 May 2013.
  9. 1 2 "Coluber constrictor (Eastern Racer)".
  10. "Eastern Racer Animal Facts". AZ Animals. Retrieved 27 July 2022.
  11. School of Computer Science. "UMass Amherst: The College of Natural Sciences". Umass.edu. Retrieved 31 May 2013.
  12. "5.031 State reptile". LAWriter: Ohio Laws and Rles. Lawriter LLC. 2008. Retrieved 22 January 2011.
  13. Eastern and Western Yellow-bellied Racers, COSEWIC Assessment and Update Status Report

Further reading