Overview
The Southern Smooth Snake (Coronella girondica), celebrated across southwestern European herpetology as the Girondine Snake or Culebra lisa meridional, is a slender, elegant, and biologically fascinating non-venomous colubrid serpent native to the sun-drenched landscapes of the western Mediterranean basin. Belonging to the smooth snake genus, this gentle, secretive reptile is celebrated for its perfectly smooth, silky scales, slender build, and remarkably peaceful disposition.
Clad in a delicate, satiny ground color of pinkish-tan, greyish-fawn, or warm ochre, Coronella girondica is adorned down its back with a subtle pattern of dark brown or reddish-grey transverse bars, an underside checkered like a chessboard with black and yellow squarish blotches, and a diagnostic, dark ‘U’-shaped or heart-shaped marking on the crown of its head. Unlike its northern relative the Smooth Snake (Coronella austriaca), which is viviparous and diurnal, the southern smooth snake is strictly oviparous and predominantly crepuscular-nocturnal, prowling traditional dry stone walls and rock crevices under the cover of warm Mediterranean nights to hunt sleeping wall lizards. Completely harmless and gentle, it is a vital component of Mediterranean food webs.
AT A GLANCE
- Common Name: Southern Smooth Snake
- Scientific Name: Coronella girondica
- Category: Reptiles
- Subcategory: Snakes
- Size: Total length 50–70 cm (20–28 in), exceptionally reaching 80–90 cm (31–35 in)
- Weight: 60–150 g (2.1–5.3 oz)
- Lifespan: 12–15 years in the wild; over 18 years in captivity
- Diet: Carnivorous specialist feeding almost exclusively on small lizards (wall lizards, geckos, skinks, slow worms), small snakes, and occasional newborn rodents
- Habitat: Mediterranean maquis scrublands, dry rocky hillsides, open oak and pine woodlands, ancient dry stone walls, sunny vineyard terraces, and stony pastures up to 2,000 meters elevation
- Range: Southwestern Europe and northwestern Africa, natively distributed across Portugal, Spain, southern and central France, Italy (including Sicily), Morocco, northern Algeria, and Tunisia
- Conservation Status: Least Concern
Biology and Physical Characteristics
Morphologically, Coronella girondica is built for navigating tight subterranean crevices and capturing agile lizards. Its body is slender, cylindrical, and exceptionally supple, tapering into a moderately long tail. Its head is small, flattened, and barely distinct from the neck, featuring a blunt, rounded snout with a small rostral scale that does not wedge deeply between the internasal scales (a key diagnostic separating it from C. austriaca). Its eyes are relatively small with round pupils and amber irises, crossed by a prominent dark stripe that extends from the nostril through the eye to the corner of the mouth, with a diagnostic vertical dark bar extending down across the cheek. Its dorsal scales are completely smooth, glossy, and unkeeled, arranged in 21 rows at mid-body. It is entirely aglyphous (non-venomous); its jaws are lined with small, uniform teeth designed to grip wriggling lizards before wrapping them in tight, muscular constricting coils.
Behavior and Ecology
Behaviorally, southern smooth snakes are secretive, crepuscular, and nocturnal, especially during the blistering heat of the Mediterranean summer. During daylight hours, they remain concealed beneath flat granite rocks, inside dry stone walls, or within abandoned rodent burrows. At twilight, they emerge to forage, moving through rocky scree with slow, deliberate stealth. Their hunting technique is specialized for squamates: upon locating a sleeping wall lizard or gecko in a rock fissure, the snake strikes with precision, throwing multiple tight body coils around the prey within fractions of a second to stop breathing and heart action before swallowing it head-first. Known for its exceptionally placid temperament, when handled it virtually never strikes or attempts to bite, relying instead on its camouflage or discharging a mild musky scent from its cloacal glands. Reproduction is oviparous: in June or July, females lay clutches of 2 to 8 elongated, white eggs under warm rocks, which hatch in late summer into independent, miniature hatchlings.
Conservation and Human Impact
The Southern Smooth Snake is classified as Least Concern on the IUCN Red List of Threatened Species, supported by its widespread distribution across the Iberian Peninsula, southern France, Italy, and northwestern Africa. Because it is an elusive, nocturnal rock-dweller, it is often under-recorded in biodiversity surveys. Major localized threats include the collapse and modernization of ancient dry stone terrace walls, agricultural intensification, and heavy mortality from domestic cats and road traffic on warm summer evenings. It is legally protected under Appendix III of the Bern Convention.
Interesting Factoid
The southern smooth snake is one of the gentlest snakes on Earth—while other snakes hiss and snap when picked up, this peaceful little reptile will simply coil gently around your fingers like a warm leather bracelet, virtually never biting!