Rhadinaea flavilata

(Cope, 1871)

Pine Woods Littersnake

G4Apparently Secure Found in 1 roadless area NatureServe Explorer →
G4Apparently SecureGlobal Rank
Least concernIUCN
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.100676
Element CodeARADB28010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVertebrate Animal
IUCNLeast concern
Endemicendemic to a single nation
KingdomAnimalia
PhylumCraniata
ClassReptilia
OrderSquamata
FamilyColubridae
GenusRhadinaea
Other Common Names
Pine Woods Snake (EN)
Concept Reference
Walley, Harlan D. 1999. Rhadinaea flavilata. Catalogue of American Amphibians and Reptiles. (699):1-5.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2025-08-31
Change Date1996-10-30
Edition Date2025-08-31
Edition AuthorsHammerson, G. (2006); rev. R. L. Gundy (2025)
Threat ImpactMedium
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences81 - 300
Rank Reasons
This species is spottily distributed through the southeastern Coastal Plain of the U.S. The population has likely suffered serious declines due to habitat loss. It continues to be threatened by habitat loss and degradation. Due to its semi-fossorial habits, little is known about population trends.
Range Extent Comments
This species is endemic to the Coastal Plain of the southeastern United States. It has a discontinuous distribution from North Carolina to southern Florida, and west to eastern Louisiana (Mount 1975, Ashton and Ashton 1981, Dundee and Rossman 1989, Reichling and Louton 1989, Conant and Collins 1991, Palmer and Braswell 1995, Walley 1999, Ernst and Ernst 2003, McKelvy et al. 2016, Krysko et al. 2019, DeVos and Bluestein 2024). It occurs mostly at elevations below 30 meters and within 120 kilometers of the coast (Ernst and Barbour 1989). Using Global Biodiversity Information Facility (GBIF) (2025) records from 2000-2025, range extent is estimated to be 736,647 km² (RARECAT 2025).
Occurrences Comments
There are dozens of occurrence throughout the range. Applying a 5 km separation distance to GBIF (2025) records, 294 occurrences are estimated (RARECAT 2025).
Threat Impact Comments
Habitat loss and degradation are likely the primary threats for this species. Long-term fire exclusion and logging are both likely degrading habitat suitability. Due to this species' near-coastal range, habitat development is a serious threat through much of the range.
Ecology & Habitat

Description

A slender snake with unkeeled dorsal scales, a dark line through the eye, and a total length of up to 40.3 cm (usually 25-33 cm); dorsum is yellowish-brown to reddish brown, paler on the lower sides; venter is white, cream, or yellowish; often there is a suggestion of a dark stripe down the center of the back and another on each side of the body; lip scales are virtually plain white or yellowish in most Florida specimens, usually dark-speckled in the western and especially northern parts of the range; 17 dorsal scale rows posterior to the neck; anal scale is divided; upper jaw has two enlarged, ungrooved teeth at the rear on each side; hatchlings are about 14-16 cm long; mature males and some females have keel-like ridges on the dorsal scales of the anal region (Ernst and Barbour 1989, Conant and Collins 1991).

Habitat

Habitat is mainly damp pine flatwoods; also slash pine and longleaf pine woodlands; habitat is maintained by periodic fire (Mount 1975, Dundee and Rossman 1989, Palmer and Braswell 1995, Tennant 1997, Ernst and Ernst 2003). Sometimes this snake is found in hardwood hammocks near pine flatwoods, along wooded edges of wet prairies, in sandhills near water, or in ecotones between sandhills and bottomlands and pocosins; some occur in dry live-oak woodlands on coastal islands off North Carolina and Florida (Ashton and Ashton 1981, Palmer and Braswell 1995, Ernst and Ernst 2003). This snake is secretive and fossorial, often occurring under loose bark, in or under rotting logs, stumps, leaf litter, or other debris, buried in sandy soil, or in burrows. During dry periods, it has been found in crayfish burrows. Eggs usually are laid in rotting wood (Martof et al. 1980).

Reproduction

Egg laying may occur from late April or May through August (Behler and King 1979, Ernst and Barbour 1989). Clutch size usually is 2-4. May lay more than one clutch each year (Fitch 1970).
Terrestrial Habitats
Forest/WoodlandForest - HardwoodWoodland - ConiferWoodland - Mixed
Palustrine Habitats
FORESTED WETLAND
Other Nations (1)
United StatesN4
ProvinceRankNative
North CarolinaS3Yes
FloridaS4Yes
GeorgiaSUYes
AlabamaS2Yes
MississippiS2Yes
LouisianaS1Yes
South CarolinaS3Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)
1.1 - Housing & urban areasLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)
1.2 - Commercial & industrial areasLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)
5 - Biological resource useRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
5.3 - Logging & wood harvestingRestricted (11-30%)Moderate or 11-30% pop. declineHigh (continuing)
7 - Natural system modificationsLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)
7.3 - Other ecosystem modificationsLarge (31-70%)Slight or 1-10% pop. declineHigh (continuing)

Roadless Areas (1)
North Carolina (1)
AreaForestAcres
Catfish Lake NorthCroatan National Forest11,299
References (23)
  1. Ashton, R. E., Jr., and P. S. Ashton. 1981. Handbook of reptiles and amphibians of Florida. Part One: The Snakes. Windward Publishing Company, Miami, Florida. 176 pp.
  2. Behler, J. L., and F. W. King. 1979. The Audubon Society field guide to North American reptiles and amphibians. Alfred A. Knopf, New York. 719 pp.
  3. Collins, J. T. 1990. Standard common and current scientific names for North American amphibians and reptiles. 3rd ed. Society for the Study of Amphibians and Reptiles. Herpetological Circular No. 19. 41 pp.
  4. Conant, R. and J. T. Collins. 1991. A field guide to reptiles and amphibians: eastern and central North America. Third edition. Houghton Mifflin Co., Boston, Massachusetts. 450 pp.
  5. Conant, R., and J. T. Collins. 1998. A field guide to reptiles and amphibians: eastern and central North America. Third edition, expanded. Houghton Mifflin Co., Boston, Massachusetts. 616 pp.
  6. Crother, B. I. (editor). 2008. Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding. Sixth edition. Society for the Study of Amphibians and Reptiles Herpetological Circular 37:1-84. Online with updates at: http://www.ssarherps.org/pages/comm_names/Index.php
  7. Crother, B. I. (editor). 2012. Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding. 7th edition. SSAR Herpetological Circular 39:1-92.
  8. Crother, B. I. (editor). 2017. Scientific and standard English names of amphibians and reptiles of North America north of Mexico, with comments regarding confidence in our understanding. 8th edition. SSAR Herpetological Circular 43:1-104. [Updates in SSAR North American Species Names Database at: https://ssarherps.org/cndb]
  9. DeVos, T. B., and S. Bluestein. 2024. A recent observation of the northernmost documented population of pine woods littersnakes (<i>Rhadinaea flavilata</i>) on the Outer Banks of North Carolina. Reptiles and Amphibians 31: e21165.
  10. Dundee, H. A., and D. A. Rossman. 1989. The amphibians and reptiles of Louisiana. Louisiana State University Press, Baton Rouge.
  11. Ernst, C. H., and R. W. Barbour. 1989b. Snakes of eastern North America. George Mason Univ. Press, Fairfax, Virginia. 282 pp.
  12. Fitch, H. S. 1970. Reproductive cycles of lizards and snakes. Univ. Kansas Museum Natural History Miscellaneous Publication 52:1-247.
  13. Frost, C.C. 2006. History and future of the longleaf pine ecosystem. Chapter 2 in: S. Jose, E.J. Jokela, and D.L. Miller, editors. The Longleaf Pine Ecosystem: Ecology, Silviculture, and Restoration. Springer-Verlag, New York, USA. Pp 9-42.
  14. Global Biodiversity Information Facility (GBIF). 2025. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2025).
  15. Krysko, K. L., K. M. Enge, and P. E. Moler. 2019. Amphibians and Reptiles of Florida. University of Florida Press, Gainesville, Florida, USA, 706 pp.
  16. Martof, B. S., W. M. Palmer, J. R. Bailey, and J. R. Harrison, III. 1980. Amphibians and reptiles of the Carolinas and Virginia. University of North Carolina Press, Chapel Hill, North Carolina. 264 pp.
  17. McKelvy, A. D., A. Ozelski-McKelvy, and A. Figueroa. 2016. A new non-coastal record for the pine woods littersnake, <i>Rhadinaea flavilata</i> Cope, 1871 (Squamata: Colubridae), in Russell County, Alabama, USA. Check List 12(3): 1913.
  18. Mount, R. H. 1975. The reptiles and amphibians of Alabama. Auburn University Agricultural Experiment Station, Auburn, Alabama. vii + 347 pp.
  19. Palmer, W. M., and A. L. Braswell. 1995. Reptiles of North Carolina. North Carolina State Museum of Natural Sciences, University of North Carolina Press, Chapel Hill, North Carolina.
  20. <p>NatureServe's Rapid Analysis of Rarity and Endangerment Conservation Assessment Tool (RARECAT). 2025. Version: 2.1.1 (released April 04, 2025).</p>
  21. Reichling, S. B., and P. Louton. 1989. Geographic distribution: <i>Rhadinea flavilata</i>. Herpetological Review 20(3): 76.
  22. Tennant, A. 1997. A field guide to snakes of Florida. Gulf Publishing Company, Houston, Texas. xiii + 257 pp.
  23. Walley, Harlan D. 1999. <i>Rhadinaea flavilata</i>. Catalogue of American Amphibians and Reptiles. (699):1-5.