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Home -> Kingdom Animalia -> Phylum Chordata -> Subphylum Vertebrata -> Class Reptilia -> Order Squamata -> Suborder Serpentes -> Family Colubridae -> Species Masticophis flagellum

Masticophis flagellum
coachwhip



2009/11/01 04:02:43.488 US/Eastern

By Isaac Gonzalez

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Reptilia
Order: Squamata
Suborder: Serpentes
Family: Colubridae
Genus: Masticophis
Species: Masticophis flagellum

Geographic Range

Masticophis flagellum is found is found in the southern half of the U.S., and the northern 2/3rds of Mexico (King 1979).

Biogeographic Regions:
nearctic (native ).

Habitat

Open hillsides, dry sand, prairies, oak and pine woodlands, grassy areas, dunes, and scrub. Not found above 2150m altitude (King 1979, Stebbins 1985)

Physical Description

This is a long, slender snake with smooth scales. The dorsal coloration in the adult varies from shades of tan, grey, pink, and red. Thin, white crossbars or blotches are found on the dorsal area behind the black or brown neck. The ventral surface is usually a tan to pinkish. Juveniles have tan, brown, or black transverse bands. In hatchlings the black neck is absent. The adult length ranges from 91.4-259 cm. The large eyes have round pupils, and are protected by supraocular scales. It has 17 dorsal scale rows at midbody, and a divided anal plate.(King 1979)

Some key physical features:
ectothermic ; bilateral symmetry .

Reproduction

In the U.S. M. flagellum reproduces once per year. Mating occurs in the spring, and females lay a clutch of 4-16 eggs in June or July. The young hatch from the granular-surfaced eggs in 6-11 weeks. Hatchlings are 30-40 cm long (King 1979, Stebbins 1985).

Key reproductive features:
gonochoric/gonochoristic/dioecious (sexes separate).

Behavior

Coachwhips are fast and agile, diurnal foragers. While hunting they hold the head and neck raised above the ground. They use scent trailing as well as vision to seek out prey. When confronted by a potential enemy they will normally flee, but if this is not feasible, then they will coil up, hissing loudly and vibrating the tail, and may strike repeatedly (King 1979, Stebbins 1985).

Key behaviors:
motile .

Food Habits

Preys on birds, rodents, lizards, other snakes(including rattlesnakes), small turtles, bird eggs, and insects. It hunts with its head raised above the ground, and will eat several small rodents during one feeding. It feeds approximately every five days. (Barker 1964)

Economic Importance for Humans: Negative

These are active, aggressive snakes, and will bite if handled. They are not venomous.

Economic Importance for Humans: Positive

Coachwhips include pest rodents and venomous snakes in their diet.

Conservation Status

IUCN Red List: [link]:
Least Concern.

One subspecies, the San Joaquin whipsnake (Masticophis flagellum ruddocki) has been listed by the California Department of Fish and Game as a "Species of Special Concern" (California Dept. of Fish and Game 2001)

Other Comments

This species can grow to be one of the largest snakes in the United States. It is a very active animal, and does not do well in captivity. The Coachwhip derived its name in part to the appearance of its tapered tail which is similar to that of a braided whip. In popular folklore, the Coachwhip was thought to wrap itself around a person and lash out with its tail, administering powerful beating whiplike movements. Following these actions it would place the edge of its tail into the nose of the victim to differentiate whether it was still breathing. There is no evidence to support these beliefs. However, the Coachwhip is known to be a very nervous snake, and will attack repeatedly if cornered.

For More Information

Find Masticophis flagellum information at

Contributors

Isaac Gonzalez (author), Fresno City College.
Jerry Kirkhart (editor), Fresno City College.

References

Barker, W. 1964. Familiar Reptiles and Amphibians of America. New York: Harper and Row.

Behler, J., F. King. 1979. The Audubon Society Field Guide to North American Reptiles and Amphibians. New York: Alfred A. Knopf, Inc..

California Department of Fish and Game, 2001. "Wildlife and Habitat Data Analysis Branch" (On-line). Accessed 26 March 2001 at http://www.dfg.ca.gov/whdab/html/animals.html.

Schmidt, K. 1944. Field Book of Snakes. Chicago, Illinois:

Stebbins, R. 1985. A Field Guide to Western Reptile and Amphibians. Boston: Houghton Mifflin Co..

2009/11/01 04:02:44.626 US/Eastern

To cite this page: Gonzalez, I. 2001. "Masticophis flagellum" (On-line), Animal Diversity Web. Accessed November 08, 2009 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Masticophis_flagellum.html.

Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

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