Sahara Sand Viper

Cerastes vipera

Vipère des sables·الأفعى القَرعَاء

Conservation status:LCLeast Concern
Population trend:Stable
Sahara Sand Viper (Cerastes vipera), Morocco

Few snakes match the desert as completely as the Sahara Sand Viper. It spends the day buried to the eyes in the sand of the great ergs, a true sand ghost that betrays its passage only by the tracks it leaves while hunting at night. Its eyes, set on top of the head, let it watch its surroundings while the rest of the body stays hidden. At dusk it sidewinds across the dunes, searching lizard burrows or lying in ambush, where females wriggle their black tail tip as a lure. Living in one of the harshest environments in Morocco, the Sahara Sand Viper can withstand intense heat without ever having access to liquid water. Along the Atlantic coast, where fog rolls in off the sea, many individuals turn almost black.

The Sahara Sand Viper (Cerastes vipera) is a short, thickset snake with a very short tail and a triangular head sharply set off from the neck. Usual length ranges from 25 to 45 cm269, and adults weigh about 20 g25.

The eyes are small and directed upwards rather than sideways, so that a buried animal can still watch its surroundings with only the eyes and nostrils above the sand2623. The scales are strongly keeled and the flank scales carry fine serrations, and it is these serrations that produce the rasping sound described under Defence26.

Several Sahara Sand Vipers (Cerastes vipera) from Morocco on white, showing colour variation
Several Moroccan Sahara Sand Vipers (Cerastes vipera) showing the phenotypic variation within the species in Morocco. Close-up portraits of a specimen from Akhfennir, whose white head lines are typical of the vipers of that area, and whole individuals from, bottom to top: Tarfaya, Merzouga, Tarfaya.

The dorsal ground colour is usually sand-yellow or orange-yellow, with faint brown blotches set regularly on either side of the vertebral line and along the flanks26. A melanistic morph exists along the coast of south-western Morocco, where roughly 70% of Sahara Sand Vipers show a dark grey ground colour and almost black markings, along with orange eyes209. The light form of the coastal population still differs from the inland form, as coastal individuals often carry white markings on the head, absent in the inland specimens (pers. obs.).

Sexual dichromatism is the clearest external sex character. The tip of the female's tail is black and conspicuous against the sand, whereas the male's is sandy or yellow and darkens only at the very end162025. Males also have relatively longer tails, accounting for 11 to 14% of total length against 7 to 9% in females2623. Females are larger and heavier than males25.

A recent taxonomic question concerned Böhme's Horned Viper (Cerastes boehmei) described from a single Tunisian specimen collected in 1991 and distinguished from the Sahara Sand Viper (Cerastes vipera) by tufts of scales forming small crowns above the eyes27. Its validity was doubted from the outset, several authors treating the horns as a scalation anomaly. Genetic work on the collected specimen placed it within Cerastes vipera, making Cerastes boehmei invalid28.

The only subspecies ever described, Cerastes vipera inornatus Werner, 1929, was based on animals whose tail matched the body colour and whose 27 dorsal scale rows fell within the range of the species2. It was invalidated more than sixty years ago17, and the species is now treated as monotypic10.

One question remains debated. Mitochondrial data split the species into a Tunisian group, a Negev group and a very broad Saharan group including the Moroccan animals, but the relationships between the three are unresolved28. The difference in colouration between the Moroccan Atlantic animals and those of the interior ergs has been put forward as a reason to examine the Moroccan populations morphologically and genetically4.

The Sahara Horned Viper (Cerastes cerastes) is a close relative of the Sahara Sand Viper (Cerastes vipera). The two are easy to separate despite similar habits and overall appearance. The Sahara Sand Viper never bears horns and its eyes sit on top of the head. In the Sahara Horned Viper the eyes are lateral and usually accompanied by clearly visible horns. The Sahara Horned Viper can measure up to 80 cm, whereas the Sahara Sand Viper rarely exceeds 45 cm.

Sahara Sand Viper (Cerastes vipera) and Sahara Horned Viper (Cerastes cerastes) compared, showing eye position
A Sahara Sand Viper (Cerastes vipera), below, compared with a Sahara Horned Viper (Cerastes cerastes). The simplest way to tell them apart remains the position of the eyes, set on top of the head in Cerastes vipera.
Sahara Sand Viper (Cerastes vipera) below Sahara Horned Vipers (Cerastes cerastes), including the mutila form
Sahara Sand Viper (Cerastes vipera) below, under Sahara Horned Vipers (Cerastes cerastes): the typical morph first, then the mutila form in the centre. Note that the Sahara Horned Viper keeps large scales above the eyes, even when hornless.
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Sahara Sand Viper (Cerastes vipera) range map in Morocco
Distribution of Cerastes vipera in Morocco.About this map

These distribution maps are produced by Fauna Morocco. Ranges are shown as estimates based on published records and our own field observations. They are updated when new data become available. Check out the references used for this map.

The Sahara Sand Viper inhabits the sandier areas of North Africa, from Mauritania and southern Morocco eastwards across the Sahara to south-western Palestine, with further records from northern Mali, Algeria, Libya, Niger, Chad, Tunisia and Egypt. It ranges from sea level to about 1,000 m29. It is absent from the northern parts of Morocco, Algeria and Tunisia4.

Within Morocco, the published records fall into three main areas: Erg Chebbi (Merzouga), Erg Chegaga and the M'Hamid El Ghizlane region, and the sandy plateaus of Atlantic Sahara including the Khnifiss lagoon, spanning 0 to 850 m4. Ecological niche models predict a wider distribution, with suitable area across most of the desert of southern Morocco5, where observations are still scattered. Two records from the southern Atlantic Sahara, one on the coastal road south of El Argoub and one on the Aousserd road, fall inside gaps of the mapped range, gaps attributed to insufficient survey effort rather than to true absence, since suitable sandy habitat is widespread along that coast7.

One record falls well outside that picture. An adult was found near Bouârfa (eastern Morocco) at 1,300 m, about 250 km north-east of the nearest known locality. The environment is a hard rocky plateau with very little sand and a sparse shrubby cover, under a cold semi-arid climate. That animal showed the colouration typical of Saharan dune populations. It is the highest altitude on record for the species anywhere, 300 m above the previous ceiling4.

The Sahara Sand Viper occurs almost exclusively on sandy terrain with sparse vegetation cover. It is most abundant in the large ergs (dune fields) and sandy coastal areas, but it also inhabits the beds of sandy oueds and the dunes banked against rocky massifs26299. In Morocco, the animals usually avoid bare, mobile dune faces and favour depressions with some vegetation, where they lie buried under small bushes with only the eyes and snout exposed20 (pers. obs.).

The Sahara Sand Viper is one of the most arid-tolerant vipers of North Africa, occurring mostly where annual rainfall remains below 250 mm and withstanding higher maximum temperatures than any other viper there5.

Sandy habitat of the Sahara Sand Viper near Smara, Morocco
Habitat of the Sahara Sand Viper (Cerastes vipera) near Smara, which it shares with its cousin, the Sahara Horned Viper (Cerastes cerastes).
Sahara Sand Viper (Cerastes vipera) in the sand near Smara, Morocco
A Sahara Sand Viper (Cerastes vipera) in that same habitat near Smara.
Sand dunes south of Merzouga, habitat of the Sahara Sand Viper, Morocco
Habitat of the Sahara Sand Viper (Cerastes vipera) south of Merzouga.
Sahara Sand Viper at the foot of a bush at dawn, south of Merzouga, Morocco
A Sahara Sand Viper (Cerastes vipera) at dawn, at the foot of a bush south of Merzouga.

The Moroccan Atlantic strip around Khnifiss is cooler and more humid, due to frequent clouds and horizontal precipitation off the sea12. This higher humidity could explain the melanism observed among the coastal populations of this viper19. A higher parasite load in a more productive environment could also favour melanistic animals, since melanin is thought to be toxic to parasites and to limit their proliferation6. Animals from areas with higher rainfall are generally heavier for their length24.

During our expeditions, we often observed multiple tracks on the sand in the morning, indicating relatively high densities in suitable habitat (pers. obs.).

Sandy coastal habitat near Tarfaya, Morocco
Coastal habitat of the Sahara Sand Viper (Cerastes vipera) near Tarfaya.
Dark Sahara Sand Viper from the coastal populations, Morocco
A dark Sahara Sand Viper (Cerastes vipera), typical of the coastal populations of the Akhfennir, Tarfaya and Laayoune area.

Activity extends from March7 to November, with peaks in April and September. Between December and February, the Sahara Sand Viper goes into winter rest, barely moving at all22.

During the activity season, animals leave their day shelter at dusk and can be found above ground for no more than six hours, with almost all sightings falling in the first three hours of the night2249.

Activity is confined to a narrow thermal window. In the Negev, no animal was found moving with a surface temperature below 17 °C or above 29 °C. Humidity and cloud cover also raise the chance of finding an animal on the move24.

Upon leaving the day shelter, the snake first crawls only 10 to 50 cm and buries itself again just below the surface. About a tenth of animals stay there for the night. The rest move on, burying themselves several more times along the way, and end the night buried again, most often inside a rodent burrow or under a bush. Most animals cover between 50 m and 300 m in a night2224. During our expeditions, we followed Sahara Sand Viper tracks for up to 800 m in Erg Chebbi (pers. obs.).

Locomotion is by sidewinding, which leaves a distinctive trail of separate, unconnected S-shaped marks on the sand262023 (pers. obs.). These vipers bury themselves by oscillating movements of the body, from the tail to the head2023 (pers. obs.).

At all life stages, the Sahara Sand Viper feeds almost exclusively on lizards222524. Other vertebrates, such as small rodents and birds, may occasionally be taken by the largest individuals262920.

Sahara Sand Vipers hunt either actively or by ambush (see Hunting). In active hunting, Sahara Sand Vipers visit the burrows of Fringe-fingered Lizards (Acanthodactylus sp.), as their entrances are left open at night. These lizards are diurnal and are hunted while sleeping25. In ambush hunting, the vipers target nocturnally active lizards, such as Short-fingered Geckos (Stenodactylus sp.)25 (pers. obs.). Females hunt from ambush more often than males (see Hunting), and the difference shows in what they eat. Nocturnal lizards make up 37.5% of the prey of adult females against 14.8% for males25.

Prey is taken both from ambush and by active searching, which is unusual among vipers. Ambushing animals lie coiled beneath the surface layer of sand, either under a bush or facing the opening of a lizard burrow. Active hunters visit rodent or lizard burrows11. Capture success rises with body size, as larger animals scan more burrows and catch more lizards per night without travelling further. This is attributed to the wider range of prey a larger snake can subdue and swallow24. In both modes, meals are rare. Between 93 and 95% of animals encountered in the field have empty stomachs2211.

Whether an ambush succeeds seems to depend on the sex of the animal. Only females have been observed moving their black tail tip, mimicking a worm when wriggled25. Moving the tip of the tail (often close to the head with a completely still body) is called caudal luring and is widespread across vipers practising ambush hunting. Males probably also hunt by ambushing, but no luring behaviour has been recorded (pers. comm.).

In females, the choice between ambushing and active hunting is seasonal and appears to be cued by increasing or decreasing day length. The proportion of animals hunting actively rose from 5% in April to over 30% in October. The shift towards active hunting in autumn is interpreted as fattening before a hibernation of several months without food. The proportion of active hunters also rises with age, from none among neonates to 31.4% in adults11.

Across its range, predation by the Eurasian Stone Curlew (Burhinus oedicnemus), the Red Fox (Vulpes vulpes) and the Black Desert Cobra (Walterinnesia aegyptia) has been recorded. The Little Owl (Athene noctua) and the Sahara Horned Viper (Cerastes cerastes) are treated as potential predators as well25 (Tesler & Sivan, unpublished). Of these, the fox, the owl and the Sahara Horned Viper occur alongside the species in Morocco. The Desert Monitor (Varanus griseus) could also feed on the Sahara Sand Viper (pers. comm.), as it was recorded preying on its cousin, the Sahara Horned Viper13.

The first line of defence of the Sahara Sand Viper is to avoid detection by predators. The animal usually spends the day and much of the night buried in the sand with only the eyes and nostrils showing. Neonates, the most vulnerable stage, rely on burial alone and never hunt actively11.

If startled, the snake usually draws itself into tight C-shaped coils and rubs the strongly keeled flank scales against one another to produce a loud rasping sound, in the manner of its congener the Sahara Horned Viper (Cerastes cerastes) and of the Saw-scaled Vipers (Echis). It may also gape, showing the fangs, as a warning. A bite usually follows only if the display is ignored20 (pers. obs.).

The venom of the Sahara Sand Viper is potent. It contains the same families of toxins as that of the Sahara Horned Viper (Cerastes cerastes)3, including the enzymes that damage blood vessels and interfere with clotting.

About a dozen envenomings have been described. Reported symptoms include pain at the bite site with swelling travelling up the bitten limb, failure of the clotting system, retention of urine, fast pulse with raised blood pressure and fever in some cases81415. A full recovery is possible within days on supportive treatment alone1415. Deaths may go unrecorded, since a bite in a remote part of the Sahara rarely reaches a hospital or the literature. A Saharan field guide does state that the bite can be fatal26.

The practical difficulty in Morocco is not the toxicity but the access to antivenom and adequate treatment. No specific antivenom is made anywhere in North Africa against this species268, and products raised against the venom of the closest species, the Sahara Horned Viper, left a substantial part of the Sahara Sand Viper's venom unneutralised8.

A bite is unlikely to kill an adult, but anyone bitten should still be taken to hospital for proper treatment.

Mating is brief and occurs between the end of April and the beginning of May. Males and females gather on the crests of the dunes and pair slightly below the surface of the sand. A single copulation usually lasts at least twenty-four hours21.

Births fall between the middle and end of August21, approximately one week after the emergence of the first neonate lizards, which constitute the primary prey of the newborn vipers2122. The Sahara Sand Viper is viviparous, giving birth to live young rather than laying eggs21. Litter size ranges from three to five or six, sometimes up to eight young2920. Newborn Sahara Sand Vipers average 3.4 g and 13.6 cm in total length. Sexual maturity is reached at about 1.5 years and 20 cm21.

No longevity figure has been published for the Sahara Sand Viper, in the wild or in captivity. The Sahara Horned Viper (Cerastes cerastes), its closest relative, lives up to 18 years in captivity1. In the wild, with predation, we estimate its life span at 5 to 10 years.

The Sahara Sand Viper is assessed as Least Concern globally by the IUCN, on the grounds of a wide range, reported local abundance and no evidence of significant decline. No major or widespread threat is recorded and the population trend is estimated as stable29. The Moroccan national red list reaches the same conclusion18.

These vipers nonetheless face the following threats:

  • Direct killing by humans29.
  • Habitat degradation and motorised tourism: the species is tied to sand, and its Moroccan populations occur in dune systems separated by unsuitable ground. Anything that degrades a given erg acts on a population that cannot easily be recolonised from elsewhere. Motorised tourism is concentrated on exactly the dune systems the species inhabits, Erg Chebbi (Merzouga) above all, but no study has measured its effect on the herpetofauna there (pers. comm.). During our expeditions, we observed numerous viper tracks and vipers in the vicinity of buggy tracks in the dunes (pers. obs.).
  • Collection for the pet trade and venom extraction: animals are taken deliberately from the wild for the pet trade and in Egypt large numbers are collected for venom extraction and are generally not released. Both forms of removal are scored as affecting a minority of the population and causing negligible decline29. Morocco appears to be little affected so far. Coastal melanistic populations could suffer from poaching to feed the pet trade in the future (pers. comm.).
Dead, dried-out Sahara Sand Viper near Tarfaya, Morocco
A Sahara Sand Viper found dead and dried out near Tarfaya. The individual photographed may have been the victim of deliberate human persecution, given the impact mark on the snake's head.

Maps

  • Bons, J., & Geniez, P. (1996). Amphibiens et reptiles du Maroc (Sahara Occidental compris). Atlas biogéographique. Asociación Herpetológica Española.
  • Martínez del Mármol, G., Harris, D. J., Geniez, P., de Pous, P., & Salvi, D. (2019). Amphibians and Reptiles of Morocco. Frankfurt Contributions to Natural History, 74. Edition Chimaira.
  1. AnAge. (2023). Cerastes cerastes. In AnAge: The Animal Ageing and Longevity Database, Build 15. Entry citing Frank & Kate's Web Page (ref. 451), sample size small, data quality acceptable. https://genomics.senescence.info/species/entry.php?species=Cerastes_cerastes Retrieved 25 August 2026.
  2. Baha el Din, S. (2006). A Guide to the Reptiles and Amphibians of Egypt.- The American University in Cairo Press; 360 pp, via Schweiger (2012).
  3. Bazaa, A., Marrakchi, N., El Ayeb, M., Sanz, L., & Calvete, J. J. (2005). Snake venomics: Comparative analysis of the venom proteomes of the Tunisian snakes Cerastes cerastes, Cerastes vipera and Macrovipera lebetina. Proteomics, 5(16), 4223-4235. https://doi.org/10.1002/pmic.200402024
  4. Bouazza, A., Laïdi, K., & Martín, J. (2020). New record of the Sahara sand viper, Cerastes vipera (Linnaeus, 1758), from north-eastern Morocco. Herpetology Notes, 13, 203-205.
  5. Brito, J. C., Fahd, S., Geniez, P., Martínez-Freiría, F., Pleguezuelos, J. M., & Trape, J.-F. (2011). Biogeography and conservation of viperids from North-West Africa: An application of ecological niche-based models and GIS. Journal of Arid Environments, 75(11), 1029-1037. https://doi.org/10.1016/j.jaridenv.2011.06.006
  6. Côte, J., Boniface, A., Blanchet, S., Hendry, A. P., Gasparini, J., & Jacquin, L. (2018). Melanin-based coloration and host–parasite interactions under global change. Proceedings of the Royal Society B: Biological Sciences, 285(1879), 20180285.
  7. Crochet, P.-A., Leblois, R., & Renoult, J. P. (2015). New reptile records from Morocco and Western Sahara. Herpetology Notes, 8, 583-588.
  8. Fahmi, L., Makran, B., Pla, D., Sanz, L., Oukkache, N., Lkhider, M., Harrison, R. A., Ghalim, N., & Calvete, J. J. (2012). Venomics and antivenomics profiles of North African Cerastes cerastes and C. vipera populations reveals a potentially important therapeutic weakness. Journal of Proteomics, 75(8), 2442-2453. https://doi.org/10.1016/j.jprot.2012.02.021
  9. García Antón, P., Peranic, V., & Martínez Del Mármol Marín, G. (2023). First record of partially melanistic individual of Cerastes vipera (Squamata: Viperidae). Boletín de la Asociación Herpetológica Española, 34, 37-41.
  10. Geniez, P. (2018). Snakes of Europe, North Africa and the Middle East: A photographic guide. Princeton University Press, via Bouazza et al. (2020).
  11. Horesh, S. J. A., Sivan, J., Rosenstrauch, A., Tesler, I., Degen, A. A., & Kam, M. (2017). Seasonal biotic and abiotic factors affecting hunting strategy in free-living Saharan sand vipers, Cerastes vipera. Behavioural Processes, 135, 40-44. https://doi.org/10.1016/j.beproc.2016.11.013
  12. Jiménez-Robles, O., León, R., Soto Cárdenas, M., Rebollo, B., & Martínez, G. (2017). Contributions to the natural history and distribution of Dasypeltis sahelensis Trape & Mané, 2006, in Morocco. Herpetozoa, 30(1/2), 80-86, via García Antón et al. (2023).
  13. León, R. (2020). Cerastes cerastes (Linnaeus, 1758). In G. Martínez, R. León, O. Jiménez-Robles, J. P. González De la Vega, V. Gabari, B. Rebollo, A. Sánchez-Tójar, J. R. Fernández-Cardenete, & J. Gállego (Eds.), Moroccoherps. Anfibios y reptiles de Marruecos y Sáhara Occidental. Version 10/04/2020. https://www.moroccoherps.com/ficha/cerastes_cerastes/ Retrieved 25 August 2026.
  14. Lifshitz, M., Phillip, M., Bernstein, T., & Sofer, S. (1995). Snake bite by Cerastes vipera in children: Report of two cases. Wilderness & Environmental Medicine, 6(3), 269-272.
  15. Lifshitz, M., Kapelushnik, J., Ben-Harosh, M., & Sofer, S. (2000). Disseminated intravascular coagulation after Cerastes vipera envenomation in a 3-year-old child: A case report. Toxicon, 38(11), 1593-1598.
  16. Marx, H. (1958). Sexual dimorphism in coloration in the viper Cerastes vipera L. Natural History Miscellanea, 164, 1-2.
  17. Pasteur, G., & Bons, J. (1960). Catalogue des reptiles actuels du Maroc. Travaux de l'Institut Scientifique Chérifien, Série Zoologie, 21, 1-132, via Schweiger (2012).
  18. Pleguezuelos, J. M., Brito, J. C., Fahd, S., Feriche, M., Mateo, J. A., Moreno-Rueda, G., Reques, R., & Santos, X. (2010). Setting conservation priorities for the Moroccan herpetofauna: The utility of regional red lists. Oryx, 44(4), 501-508.
  19. Sahlean, T. C., Martin, R. A., Spaseni, P., Gherghel, I., & Strugariu, A. (2025). Melanism in Polymorphic Terrestrial Snakes: A Meta-Analysis and Systematic Review. Journal of Biogeography, 52(1), 27–41.
  20. Schweiger, M. (2012). Cerastes vipera (Linnaeus, 1758). In G. Martínez, R. León, O. Jiménez-Robles, J. P. González De la Vega, V. Gabari, B. Rebollo, A. Sánchez-Tójar, J. R. Fernández-Cardenete, & J. Gállego (Eds.), Moroccoherps. Amphibians and reptiles of Morocco and Western Sahara. Version 02/08/2012, updated 23/03/2020 by G. Martínez del Mármol. https://www.moroccoherps.com/en/ficha/cerastes_vipera/ Retrieved 26 August 2026.
  21. Sivan, J., Kam, M., Hadad, S., Degen, A. A., Rozenboim, I., & Rosenstrauch, A. (2012). Reproductive cycle of free-living male Saharan sand vipers, Cerastes vipera (Viperidae) in the Negev desert, Israel. General and Comparative Endocrinology, 179(2), 241-247. https://doi.org/10.1016/j.ygcen.2012.08.021
  22. Sivan, J., Kam, M., Hadad, S., Degen, A. A., Rozenboim, I., & Rosenstrauch, A. (2013). Temporal activity and dietary selection in two coexisting desert snakes, the Saharan sand viper (Cerastes vipera) and the crowned leafnose (Lytorhynchus diadema). Zoology, 116(2), 113-117. https://doi.org/10.1016/j.zool.2012.09.002
  23. Sivan, J., Tesler, I., Hadad, S., Degen, A. A., Geffen, E., & Kam, M. (2023). Testing the morphological constraint hypothesis of tail length in the sexually dimorphic Cerastes vipera and new perspectives. Scientific Reports, 13, Article 4447. https://doi.org/10.1038/s41598-023-31624-6
  24. Subach, A., Scharf, I., & Ovadia, O. (2009). Foraging behavior and predation success of the sand viper (Cerastes vipera). Canadian Journal of Zoology, 87(6), 520-528. https://doi.org/10.1139/Z09-034
  25. Tesler, I., Sivan, J., Rosenstrauch, A., Horesh, S. J. A., Degen, A. A., & Kam, M. (2019). Sexual dichromatisation and sexual differences in hunting behavior and dietary intake in a free-ranging small viperid snake, Cerastes vipera. Behavioural Processes, 168, Article 103960. https://doi.org/10.1016/j.beproc.2019.103960
  26. Trape, J.-F., & Mané, Y. (2006). Guide des serpents d'Afrique occidentale: Savane et désert. IRD Éditions.
  27. Wagner, P., & Wilms, T. M. (2010). A crowned devil: New species of Cerastes Laurenti, 1768 (Ophidia, Viperidae) from Tunisia, with two nomenclatural comments. Bonn Zoological Bulletin, 57(2), 297-306.
  28. Waldhauser, V., Busschau, T., Mochales-Riaño, G., Scholz, S., Martínez-Freiría, F., Boissinot, S., Carranza, S., Schmitz, A., & Šmíd, J. (2025). Unmasking the desert phantom: Genetic evidence does not support the validity of the enigmatic Boehme's horned viper. Zoologica Scripta, 54(6), 817-822. https://doi.org/10.1111/zsc.70013
  29. Wilms, T., Wagner, P., Joger, U., Geniez, P., Crochet, P.-A., El Mouden, E. H., & Mateo, J. A. (2013). Cerastes vipera. The IUCN Red List of Threatened Species 2013: e.T178210A15636436. https://dx.doi.org/10.2305/IUCN.UK.2013-1.RLTS.T178210A15636436.en Accessed on 26 August 2026.

How to cite

Ruffieux, C., & Vuillemin, R. (2026). Sahara Sand Viper (Cerastes vipera). In: Castella, C., Iallaten, H., Ruffieux, C., & Vuillemin, R. (Eds.), Fauna Morocco. The Free Encyclopedia: Reptiles & Amphibians of Morocco. Available from https://fauna-morocco.org/encyclopedia/serpentes/viperidae/cerastes-vipera.html (accessed 18 September 2026).

Published

18 September 2026

Last updated

22 September 2026

Authors

Colin Ruffieux
Rayane Vuillemin

Reviewers

Clément Castella
Haytam Iallaten
Mohamed Taha Aissaoui

Photography

Rayane Vuillemin

Methodology

Each account is a scientific synthesis: we compile the literature, read each paper in full, verify facts against their original sources when possible, and flag uncertainties for expert review. It is written first in English, reviewed by the team, then translated into French and Arabic. Every claim is referenced, and accounts are updated as knowledge advances. If you spot a mistake or an omission, please get in touch so we can fix it.