The pine woods snake (''Rhadinaea flavilata''), also commonly known as the yellow-lipped snake or the brown-headed snake, is a
species of secretive
colubrid found in scattered locations across the south-eastern United States. ''Rhadinaea flavilata'' is
rear-fanged
A snake skeleton consists primarily of the skull, vertebrae, and ribs, with only vestigial remnants of the limbs.
Skull
The skull of a snake is a very complex structure, with numerous joints to allow the snake to swallow prey far larger than i ...
and mildly-venomous, but not dangerous to humans.
Description
''R. flavilata'' is a small reddish brown to yellowish brown or dark orange snake with a whitish to yellowish, unmarked underside. A dark stripe runs through the eye. A light stripe may be present along the middle of the back. The upper
labial scales
The labial scales are the scales of snakes and other scaled reptiles that border the mouth opening. These do not include the median scales on the upper and lower jawsWright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates (7 ...
(lip scales) are a whitish or pale yellow color which led to its other common name, the yellow-lipped snake.
Pine woods snakes average between 10 and 13 inches (25–33 cm) in total length (including tail) at adult size.
Natural habitat
''R. flavilata'' is found in scattered localities in coastal
North Carolina and
South Carolina, most of peninsular
Florida, and small portions of
Georgia,
Alabama, and
Louisiana. The pine snake inhabits pine and mixed-pine hardwood forests. They can be found in damp woodlands, under bark and in rotten logs and stumps.
The species has a scattered geographic distribution with large expanses occurring between known populations.
Behavior and diet
Because many ''R. flavilata'' are found in warm coastal areas, they are active for most of the year. They will hibernate underground or in logs in cold winter conditions. There is little information about the diet of the ''R. flavilata''. Captive species prey on small
frogs,
salamanders and small
lizards
Lizards are a widespread group of squamate reptiles, with over 7,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. The group is paraphyletic since it excludes the snakes and Amphisbaenia althou ...
.
[ Conant R. 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. (hardcover), (paperback). (''Rhadinaea flavilata'', pp. 175-176 + Plate 25 + Map126).]
Reproduction
Pine woods snakes lay eggs.
[ Schmidt KP, Davis DD. 1941. ''Field Book of Snakes of the United States and Canada''. New York: G.P. Putnam's Sons. 365 pp. (''Rhadinaea flavilata'' pp. 113-114, Figure 24 + Plate 9).] There is little know information about reproduction. Mating probably occurs in the spring and one to four eggs are laid during the summer months. Some females lay two
clutches
A clutch is a mechanical device that engages and disengages power transmission, especially from a drive shaft to a driven shaft. In the simplest application, clutches connect and disconnect two rotating shafts (drive shafts or line shafts). ...
of eggs each year. The incubation period is six to eight weeks.
Predators
Natural predators of the ''R. flavilata'' include the
Southern black racer
The southern black racer (''Coluber constrictor priapus'') 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 sp ...
and the
Kingsnake
Kingsnakes are Colubridae, colubrid New World members of the genus ''Lampropeltis'', which includes 26 species. Among these, about 45 subspecies are recognized. They are nonvenomous and ophiophagy, ophiophagous in diet.
Description
Kingsnakes ...
, as well as carnivorous pine forest animals.
Shrews, birds and toads are likely predators. Pine woods snakes do not bite when picked up but they can release a foul-smelling odor.
References
Further reading
*
Conant R, Bridges W. 1939. ''What Snake is That?: A Field Guide to the Snakes of the United States East of the Rocky Mountains''. (with 108 drawings by Edmond Malnate). New York and London: D. Appleton-Century. Frontispiece map + 163 pp. + Plates A-C, 1-32. (''Rhadinaea flavilata'', p. 70 + Plate C, Figure 11).
*
Cope ED. 1871. Ninth Contribution to the Herpetology of Tropical America. ''Proc. Acad. Nat. Sci. Philadelphia'' 23 (2): 200-224. (''Dromicus flavilatus'', new species, pp. 222–223).
*
Malnate E. 1939. A Study of the Yellow-Lipped Snake, ''Rhadinaea flavilata'' (Cope). ''Zoologica'' 24: 359-366 + one plate.
*
Zim HS,
Smith HM. 1956. ''Reptiles and Amphibians: A Guide to Familiar American Species: A Golden Nature Guide''. New York: Simon and Schuster.160 pp. (''Rhadinaea flavilata'', pp. 83–84, 156).
External links
Reptile Database
{{Taxonbar, from=Q2381444
Colubrids
Reptiles described in 1871
Fauna of the Southeastern United States
Reptiles of the United States