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Western Whip Snake

Published: 31 December 2025

This is one of Italy's most common snake species and is found over the whole of Italy including Sicily, Sardinia and other coastal islands.

Coluber viridiflavus: Western Whip Snake (aka Dark Green Snake, Biacco)

Range:

Identification:

Full adult colouring in fourth year 19 back scales across the mid-body, 187-227 belly scales (187-212 in males and 197-227 in females) and 95-125 pairs of scales beneath the tail. Adults of this species can grow up to 150cm and beyond, they are slender with a smallish, well defined head with smooth scales and prominent eyes with large round pupils. Unfortunately there is a marked variation in the colour of this snake, adding to confusion over species identification. Throughout the south of Italy and Sicily, this species is almost entirely black, but on a whole they tend to have a greenish-yellow ground colour with black/dark green pigment forming crossbars or foreparts over the body to yellowish streaks or rows of spots. The tail of this species is very distinct and the striping is usually much more visible here. The underbelly is yellowish or greyish (rarely reddish) and sometimes has small darker spots.

The juveniles have a very distinct head pattern with light bars between the eyes and spots on the parietal scales with a 'V' or 'W' shaped mark behind these. Their body tends to be a pale grey or olive. This species is often confused with the Balkan Whip Snake (Coluber gemonensis), and although their range does overlap, in respect to Italy, the Balkan Whip snake only occurs in the extreme north east.

Similarly, it has also been likened to the Horseshoe Whip Snake (Coluber hippocrepis) which occurs in the south west of Sardinia and also confused with some of the Rat snake (Elaphe) species found in Italy, but these tend to have characteristic patterns and higher numbers of dorsal scale rows. Another similar species is the Montpellier snake (Malpolon monspessulanus) which occurs in Liguria and Trentino only and has a distinct head shape.

Habits and Behaviour:

This is a frequently spotted, largely diurnal and terrestrial species. It is also a good climber and can be found in a wide range of habitats of mainly dry, open but well vegetated habitats up to 1500m. This species hibernates usually during September to April, in rock cracks, mammal burrows and outbuildings, sometimes communally. It is known to travel quite long distances between it's summer and winter quarters, but when active during the summer they have a very limited area which they use, which has been known in Italy to cover 3,000 metres squared only. Within this area, the snake will hide in the shade during the hottest part of the day and find areas to bask and feed. This snake is very fast and agile, hunting by sight, and is incredibly aggressive if caught or cornered, biting hard and persistently.

Food includes many lizards, small mammals, nestling birds, snakes and frogs. Juveniles eat insects and small lizards and lizard eggs. Males may travel up to 3km to find a mate and will fight with other males, lashing each other with their tails. Females lay between 4-15 elongate eggs, often between 4-7 eggs in Italy, and they are about 30-40mm by 15-22mm in size with star shaped concretions on the shell. After around 6-8 weeks these will hatch with snakes of around 20-25cm long, with the described juvenile coloration until they take the adult markings after 4 years.

Vipers

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Italy natural landscape — Mountains, plains, coastlines, and islands — the physical systems that shape climate, life, water, and natural risk.

Italy — nature snapshot

Stable reference signals for quick environmental orientation.

Terrain

Highly varied

Alps in the north, an Apennine spine through the peninsula, large plains, long coastlines, and major islands. Sharp contrasts can occur over short distances, creating strong local “micro-regions.”

Climate

Multi-zone

Mediterranean patterns dominate many coasts, with alpine conditions at altitude and more continental influence inland. Latitude, elevation, and exposure shape rainfall, temperature, wind, and seasonality.

Volcanism

Active systems

Volcanic landscapes appear both as islands and mainland zones. Risk and monitoring focus on specific volcanic areas rather than being uniform nationwide.

Earthquakes

Frequent

Italy sits in an active tectonic setting, so seismicity is a persistent national reality. Exposure varies by region, with building standards and local geology strongly affecting impacts.

Water

Seasonal

Rivers and lakes structure settlement and corridors, while rainfall and snowpack drive seasonal availability. Drought, floods, and water management pressures can intensify during extreme seasons.

Coasts

Extensive

Long coastlines create maritime climates, wetlands, dunes, cliffs, and port landscapes. Coastal zones also concentrate tourism and infrastructure, increasing sensitivity to erosion and storm events.

Habitats

Dense mosaic

Alpine forests, Mediterranean scrub, wetlands, river plains, high meadows, and island ecosystems coexist in tight space. This habitat variety supports strong biodiversity and regional specialisation.

Key risks

Multiple

Earthquakes and volcanic activity combine with hydro-meteorological risks: floods, landslides, wildfire, and heat stress. Most impacts are local, but climate extremes can produce national-scale disruption.

Geography

A compressed landscape

Italy packs major terrain types into a narrow footprint: alpine massifs, a long mountain spine, broad plains, volcanic zones, and extensive coasts. This compression produces strong local contrasts in vegetation, agriculture, settlement density, and mobility — even between neighbouring valleys or coastlines. For readers, “place” often equals “terrain,” because terrain dictates climate, water, and the rhythm of life.

Climate

Mediterranean, alpine, continental

Climate shifts quickly with latitude and altitude, producing warmer maritime coasts, colder mountain zones, and more continental interiors. Rainfall patterns vary widely: some areas are shaped by winter storms, others by summer dryness, and many by sharp seasonal transitions. Exposure and microclimates matter — wind corridors, lake effects, and mountain barriers often explain local conditions better than a national average.

Seismology

An active boundary zone

Italy sits in a tectonically active setting, which is why earthquakes are recurrent and why volcanism remains a live factor in certain regions. Risk is uneven: geology, local ground conditions, and building stock can amplify or reduce impacts. The practical takeaway is preparedness — monitoring, building standards, and land-use planning are part of living sustainably in this landscape.

Biodiversity

High diversity, tight space

Italy’s habitat mosaic supports rich plant and animal life, including alpine species, Mediterranean specialists, wetland communities, and island endemics. Many ecosystems are closely interlocked, so change in water regimes, temperature extremes, or land management can cascade quickly. Conservation is therefore both about protected areas and about how farmland, forests, rivers, and towns connect as an ecological network.