|
 |
| Adult, Inyo County |
 |
 |
 |
| |
Adult, Inyo County |
(underside) |
 |
 |
 |
| Adult, Inyo County |
Underside of adult, Inyo County |
Adult, Inyo County |
 |
 |
 |
Tulare County © Patrick Briggs
|
Adult, Inyo County © Brad Alexander
|
 |
 |
 |
| Adult, 29 Palms, San Bernardino County © Walter Combs |
Adults with a relatively pale dorsal color, San Bernardino County
© Adam G. Clause |
 |
 |
 |
| Adult, Kern County © Ryan Sikola |
Adult, Kern County © Ryan Sikola |
This snake was found taking shelter under a piece of concrete in mid December in Tulare County © Tony Kurz |
| |
|
| Smith's Black-headed Snake From Outside California |
 |
 |
 |
| |
Adult, Pima County, Arizona |
|
| |
|
|
| Habitat |
 |
 |
|
| Habitat, Inyo County |
Habitat, Inyo County |
|
| |
|
|
| Short Video |
| |
 |
|
A tiny Smith's Black-headed snake crawls across a paved road at night.
|
| |
| Similar Species |
Comparison Chart of Tantilla hobartsmithi - Smith's Black-headed Snake and Tantilla planiceps - Western Black-headed Snake.
A plain-colored Variable Ground Snake with black on the head is sometimes confused with a Black-headed Snake, but the ground snake has a loreal scale, which is not present in Tantilla, and lacks the red coloring on the belly. |
 |
 |
|
| |
Underside of Variable Groundsnake |
Underside of
Smith's Black-headed Snake |
|
|
Description |
Not Dangerous (Non-poisonous) - This snake does not have venom that is dangerous to most humans.
|
Mildly venomous. This snake uses its grooved and enlarged rear teeth and a mild form of venom in its saliva to immobilize its invertebrate prey. This venom is considered harmless to humans.
|
| Size |
One of the smallest snakes in California, about 4.5 - 15 inches long (11.5 - 38 cm).
|
| Appearance |
| A small, thin, snake with a flat head and smooth, shiny scales. |
| Color and Pattern |
The body color is brownish or beige and unmarked.
The top of the head is dark brown or black, with a light collar between the dark cap and the body color.
The dark color usually does not extend lower on the head than the bottom of the eye and does not extend below the mouthline behind the corner of the jaw.
The belly is whitish with a reddish stripe that does not extend all the way to the edge of the ventral scales.
This stripe may fade out toward the head.
|
| Life History and Behavior |
Activity |
Secretive - spends much of its time underground or underneath surface objects.
Not much is known about this snake.
A good burrower, able to disappear quickly into loose soil.
Typically it is found beneath surface debris.
(I have also seen this snake active on the surface on a cool May morning in the Guadalupe Mountains in Texas. The trail wildlife sighting log indicated that several other people had seen black-headed snakes active on the trail recently.) |
| Diet and Feeding |
| Eats a variety of invertebrates and their larvae including millipedes and centipedes. |
| Breeding |
Lays up to 3 eggs in summer.
|
| Habitat |
Found in desert, grassland, sagebrush, creosote bush, chaparral, juniper scrub, open coniferous forests. Prefers canyon bottoms and the rocky edges of streams and washes. Often found beneath rocks, plant debris, and other surface cover.
|
| Geographical Range |
The known range of this species in California and elsewhere is spotty due to its secretive nature.
Its range is probably less disjointed than the records show.
It has been recorded from the southern Sierra Nevada foothills and in the southern San Joaquin Valley, in the Owens Valley north to the White Mountains, through the Death Valley region, and in isolated locations in the eastern Mojave desert.
I have received an unconfirmed report of a Tantilla, presumably this species, found in the Imperial Valley at the southern end of the Salton Sea.
Outside of California, it occurs in Nevada, Utah, Colorado, Arizona, New Mexico, Texas, and Mexico.
|
 |
| Notes on Taxonomy |
Formerly classified with Tantilla planiceps. There are around 50 species of Tantilla from North America to Argentina, with two occurring in California, including T. planiceps.
Alternate and Previous Names (Synonyms)
Tantilla hobartsmithi - Southwestern Black-headed Snake (Stebbins & McGinnis 2012)
Tantilla hobartsmithi - Southwestern Black-headed Snake (Smith's Black-headed Snake) (Stebbins 2003)
Tantilla hobartsmithi - Southwestern Black-headed Snake (Stebbins 1985)
Tantilla planiceps utahensis - Utah Black-headed Snake (Stebbins 1966)
Tantilla planiceps transmontana - Desert Black-headed Snake (Stebbins 1966)
Tantilla utahensis - Utah black-headed snake (Stebbins 1954) (Panamint Mountains and Sequoia National Park populations.)
Tantilla eiseni - California Black-headed snake (Stebbins 1954)
Tantilla utahensis - Utah black-headed snake (Blanchard 1938)
Tantilla hobartsmithi - Smith's Black-headed Snake (Taylor, 1937)
Sonoran tantilla (Van Denburgh 1922)
Blanchard's black-headed snake
California tantilla
|
| Conservation Issues (Conservation Status) |
| None |
|
| Taxonomy |
| Family |
Colubridae |
Colubrids |
Oppel, 1811 |
| Genus |
Tantilla |
Black-headed Snakes |
Baird and Girard, 1853 |
Species
|
hobartsmithi |
Smith's Black-headed Snake |
Taylor, 1937 |
|
Original Description |
Tantilla hobartsmithi - Taylor, "1936" 1937 - Trans. Kansas Acad. Sci., Vol. 39, p. 340
from Original Description Citations for the Reptiles and Amphibians of North America © Ellin Beltz
|
|
Meaning of the Scientific Name |
Tantilla - Latin - tantillum - so small a thing - refers to the small size
hobartsmithi - honors Smith, Hobart M.
from Scientific and Common Names of the Reptiles and Amphibians of North America - Explained © Ellin Beltz
|
|
Related or Similar California Snakes |
T. planiceps - Western Black-headed Snake
H. t. nuchalata - California Nightsnake
H. t. deserticola - Desert Nightsnake
|
|
More Information and References |
California Department of Fish and Wildlife
Stebbins, Robert C., and McGinnis, Samuel M. Field Guide to Amphibians and Reptiles of California: Revised Edition (California Natural History Guides) University of California Press, 2012.
Stebbins, Robert C. California Amphibians and Reptiles. The University of California Press, 1972.
Stebbins, Robert C. A Field Guide to Western Reptiles and Amphibians. 3rd Edition. Houghton Mifflin Company, 2003.
Behler, John L., and F. Wayne King. The Audubon Society Field Guide to North American Reptiles and Amphibians. Alfred A. Knopf, 1992.
Powell, Robert., Joseph T. Collins, and Errol D. Hooper Jr. A Key to Amphibians and Reptiles of the Continental United States and Canada. The University Press of Kansas, 1998.
Bartlett, R. D. & Patricia P. Bartlett. Guide and Reference to the Snakes of Western North America (North of Mexico) and Hawaii. University Press of Florida, 2009.
Bartlett, R. D. & Alan Tennant. Snakes of North America - Western Region. Gulf Publishing Co., 2000.
Brown, Philip R. A Field Guide to Snakes of California. Gulf Publishing Co., 1997.
Ernst, Carl H., Evelyn M. Ernst, & Robert M. Corker. Snakes of the United States and Canada. Smithsonian Institution Press, 2003.
Wright, Albert Hazen & Anna Allen Wright. Handbook of Snakes of the United States and Canada. Cornell University Press, 1957.
|
|
| Conservation Status |
The following status listings are copied from the April 2018 Special Animals List and the 2017 Endangered and Threatened Animals List, both of which are published by the California Department of Fish and Wildlife.
If no status is listed here, the animal is not included on either CDFW list. This most likely indicates that there are no serious conservation concerns for the animal. To find out more about an animal's status, you can go to the NatureServe and IUCN websites to check their rankings.
Check here to see the most current complete lists.
This snake is not included on the Special Animals List, which indicates that there are no significant conservation concerns for it in California.
|
Organization
|
Status Listing
|
| NatureServe Global Ranking |
|
|
| NatureServe State Ranking |
|
|
| U.S. Endangered Species Act (ESA) |
None |
|
| California Endangered Species Act (CESA) |
None |
|
| California Department of Fish and Wildlife |
None |
|
| Bureau of Land Management |
None |
|
| USDA Forest Service |
None |
|
| IUCN |
|
|
|
|
