Southern hognose snake (Heterodon simus)

loading
Southern hognose snake feeding on a toad
loading
Loading more images and videos...

Southern hognose snake fact file

Southern hognose snake description

KingdomAnimalia
PhylumChordata
ClassReptilia
OrderSquamata
FamilyColubridae
GenusHeterodon (1)

The southern southern hognose snake (Heterodon simus) is the smallest member of the genus heterodon (4). All members of the genus have a characteristic upturned snout (5). This species has a tan coloured body with square blocks of brown running down its back, and orange scales between the brown patches. Small, round, dark brown blotches run along its sides and it has a cream or light grey belly with no markings (4) (6).The southern hognose snake is rough to the touch, as it has keeled, or ridged scales (7). The female southern hognose snake is larger than the male (4).

Also known as
Southern hog-nosed snake.
Top

Southern hognose snake biology

The southern hognose snake is a secretive species and is rarely spotted in the wild, spending much of its time in underground in burrows, 20 to 30 centimetres below the surface. It is thought to be diurnal, emerging from its burrow in early morning or late afternoon (4) (11).

Little is known about the southern hognose snake’s breeding biology, and most of the available information has been obtained through studying captive animals. The breeding season is thought to be from May to June, and the female southern hognose snake will lay a clutch of 6 to 14 eggs from late spring to early summer. The eggs take 65 to 70 days to hatch and the hatchlings emerge between mid-September and early October (4) (7).

Contrary to popular belief, the southern hognose snake does not produce toxic venom and it is not considered to be a dangerous species, although it does have a painful bite (12). It feeds mainly on toads, which it digs out of loose soil using its upturned snout. It then grasps the prey using its enlarged rear fangs (4) (6) (11). Although toads form the majority of the southern hognose snake’s diet, it also feeds on other small vertebrates such as lizards, mice and frogs (7).

To deter predators, the southern hognose snake uses a variety of defensive behaviours including puffing up its head, flattening its neck, hissing continuously and pretending to strike. The snake also employs an alternative strategy, rolling onto its back and playing dead. The southern hognose snake’s defensive display is less elaborate than that of other hognose snakes (4) (6) (11).

Top

Southern hognose snake range

Endemic to North America, the southern hognose snake is only found in the southeast of the United States. It is distributed from eastern North Carolina to southern Florida, and as far west as south-eastern Mississippi. However, a recent population survey failed to locate the southern hognose snake in Mississippi or Alabama, and it is possible that it has been eliminated from these states (1) (4).

Top

Southern hognose snake habitat

The southern hognose snake can be found in dry, open areas, such as coastal sand dunes, river floodplains, and mixed oak-pine woodlands. It prefers sandy or loamy, well-drained soil, which it can easily burrow in (1) (7) (8) (9) (10).

Top

Southern hognose snake status

The southern hognose snake is classified as Vulnerable (VU) on the IUCN Red List (1).

IUCN Red List species status – Vulnerable

Top

Southern hognose snake threats

A lack of information on the abundance and distribution of the southern hognose snake makes it difficult to determine the threats to this species. However, the most important factors are thought to be habitat loss and invasive species (4).

The fire ant (Solenopsis invicta), an invasive species introduced to the USA, predates on reptile eggs and hatchlings (13). The specific impact these ants have on the southern hognose snake is unknown, but areas with heavy fire ant infestations have recorded a disappearance of the southern hognose snake (1) (4) (6).

Lack of proper fire management has resulted in the loss of dry sand hills, which are an important habitat for the southern hognose snake. Road networks have also fragmented habitats, and although the southern hognose snake can withstand this disturbance, road mortality is a significant threat, especially for hatchlings (1) (4) (7). Further concerns include pesticide application and the habitual persecution of snakes by humans (1).

Top

Southern hognose snake conservation

There is no formal federal protection for the southern hognose snake, although it occurs in some protected areas (1) (7). Worryingly, this species seems to have disappeared from relatively undisturbed protected sites. It is important to investigate the causes of the southern hognose snake’s decline, and create and implement appropriate management measures. Recommendations include protecting large areas of suitable habitat, controlling imported fire ants, limiting pesticide application, and promoting the harmless nature of the southern hognose snake to the general public (1).

Top

Find out more

More information on reptile conservation:

Top

Authentication

This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact:
arkive@wildscreen.org.uk

This species information was authored as part of the ARKive and Universities Scheme.
Top

Glossary

Diurnal
Active during the day.
Endemic
A species or taxonomic group that is only found in one particular country or geographic area.
Genus
A category used in taxonomy, which is below ‘family’ and above ‘species’. A genus tends to contain species that have characteristics in common. The genus forms the first part of a ‘binomial’ Latin species name; the second part is the specific name.
Invasive species
Species introduced deliberately or unintentionally outside their natural habitats where they have the ability to establish themselves, invade, outcompete natives and take over the new environments.
Top

References

  1. The IUCN Red List (August, 2011)
    http://www.iucnredlist.org/
  2. Conant, R., and Collins, J.T. (1991) A Field Guide to Reptiles and Amphibians of Eastern and Central North America. Houghton and Mifflin Company, Boston.
  3. Martof, B.S., Palmer, W.M., Bailey, J.R. and Harrison, J.R (1980) Amphibians and Reptiles of the Carolinas and Virginia. University of North Carolina Press, Chapel Hill.
  4. Tuberville, T.D., Bodie, J.R., Jensen, J.B., LaClaire, L. and Gibbons, J.W. (2000) Apparent decline of the southern hog-nosed snake, Heterodon simus. Journal of the Elisha Mitchell Scientific Society, 116: 19-40.
  5. Richardson, A.D. (2004) Hognose Snakes. Capstone Press, Minnesota.
  6. Gibbons, J.W. and Dorcas, M.E. (2005) Snakes of the Southeast. University of Georgia Press, Georgia.
  7. Jensen, J.B., Camp, C.D., Gibbons, W. and Elliott, M.J. (Eds.) (2008) Amphibians and Reptiles of Georgia. University of Georgia Press, Georgia.
  8. Burbrink, F.T., Phillips, C.A. and Heske, E.J. (1998) A riparian zone in southern Illinois as a potential dispersal corridor for reptiles and amphibians. Biological Conservation, 86: 107-115.
  9. Kaufmann, R.K. and Cleveland, C.J. (2007) Environmental Science. McGraw-Hill Higher Education, New York.
  10. Wassersug, R.J., Roberts, L., Gimian, J., Hughes, E., Saunders, R., Devison, D., Woodbury, J. and O’Reilly, J.C. (2005) The behavioral responses of amphibians and reptiles to microgravity on parabolic flights. Zoology, 108(2): 107-120.
  11. Savannah River Ecology Laboratory - Southern hognose Snake (August, 2011)
    http://www.uga.edu/srelherp/snakes/hetsim.htm
  12. Weinstein, S.A. and Keyler, D.E. (2009) Local envenoming by the western hognose snake (Heterodon nasicus): A case report and review of medically significant Heterodon bites. Toxicon, 54(3): 354-360.
  13. United States Department of Agriculture: National Invasive Species Information Centre (August, 2011)
    http://www.invasivespeciesinfo.gov/animals/rifa.shtml
X
Close

Image credit

Southern hognose snake feeding on a toad  
Southern hognose snake feeding on a toad

© Barry Mansell / naturepl.com

Nature Picture Library
5a Great George Street
Bristol
BS1 5RR
United Kingdom
Tel: +44 (0) 117 911 4675
Fax: +44 (0) 117 911 4699
info@naturepl.com
http://www.naturepl.com

X
Close

Link to this photo

ARKive species - Southern hognose snake (Heterodon simus) Embed this ARKive thumbnail link ("portlet") by copying and pasting the code below.

Terms of Use - The displayed portlet may be used as a link from your website to ARKive's online content for private, scientific, conservation or educational purposes only. It may NOT be used within Apps.

Read more about

X
Close

MyARKive

MyARKive offers the scrapbook feature to signed-up members, allowing you to organize your favourite ARKive images and videos and share them with friends.

Play the Team WILD game:

Team WILD, an elite squadron of science superheroes, needs your help! Your mission: protect and conserve the planet’s species and habitats from destruction.

Conservation in Action

Which species are on the road to recovery? Find out now »

This species is featured in:

Learn more about the world’s snakes on our topic page.

Help us share the wonders of the natural world. Donate today!

Blog RSS