Snakes in Mallorca: Identifying Species and Reacting Correctly

If you live in Mallorca and have anything to do with a garden, finca or dry-stone walls, sooner or later you'll come across the topic of snakes in Mallorca – whether while hiking, mowing the lawn, or because a neighbour shares a video from the internet. The headlines of recent months sound dramatic: sightings on beaches, on kayaks, right in the middle of bathing coves. This guide separates what is officially documented for Mallorca from what belongs to other islands, classifies the species found here, explains the official reporting app run by COFIB, and shows how to behave sensibly if you encounter one in the garden or on a hiking trail.

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What's confirmed – and what just looks like a lot

Two very different types of information circulate about snakes in the Balearic Islands, and the difference determines whether the topic is assessed correctly.

On one side there are individual videos: a snake on the beach, one in the pool, one on a kayak. Such footage spreads quickly and looks like evidence of a trend. But that's exactly what it isn't – a filmed encounter says nothing about populations, frequency or risk. We deliberately do not list such incidents here as a chronicle.

On the other side are the figures from the Govern, and these are reliable because they come from a systematic programme involving traps and from a reporting system. They tell us two things: on the Pityusic Islands, a large-scale control campaign is underway. And for Mallorca, there is so far no comparable capture statistic – here the data basis is essentially what citizens report.

This distinction is maintained throughout the article from here on.

Which snake species occur in Mallorca

You won't find an identification guide by appearance here, and that's deliberate. The reason isn't laziness: the species resemble one another, their markings vary greatly, and a wrong rule of thumb leads to exactly the action one wants to avoid – someone touching an animal because they think it's "the harmless one".

Two names are officially documented, and both come from the Govern's announcements:

According to press reports on a guide issued by the Balearic environment department, a total of five snake species occur in the Balearics, of which two are considered native and protected and three introduced. We present this breakdown for what it is – second-hand information, not the official text itself.

For you, one thing above all is important: among the animals you might encounter in the garden, there are also protected species. Anyone who catches or kills an animal themselves could therefore end up hitting precisely the one that is under protection – and thereby making themselves liable. This is the practical reason to leave every animal alone and report it instead, regardless of how confident one feels about identifying it.

Where do the introduced snakes come from?

There is no officially confirmed year for when the introduction occurred. The most plausible explanation, repeated in several reports, is the trade in large ornamental trees – above all olive and carob trees – from the Spanish mainland, often from Andalusia, which are also popular for fincas and hotel gardens. Experts suspect the introduction began in the early 21st century. On the island, the animals have hardly any natural predators, which favours their spread.

Are snakes on Mallorca dangerous to humans?

Here, precision is more useful than gut feeling. There is no official medical risk classification by the responsible authorities for the species found on Mallorca. What is officially documented, however, is that the Govern's control programme for the Pityusic Islands is explicitly aimed at protecting the native lizard (sargantana pitiüsa) and is described as an ecological emergency – not as a danger to humans. None of the official statements mention toxicity or bite injuries to humans.

What follows from this, and what doesn't: the fact that the authorities consistently treat the topic as a nature-conservation issue and none of the statements warn of a danger to humans is a strong indication – but it is not a medical all-clear, and this guide does not offer one either. Anyone wanting certainty about which species they are dealing with, and what a bite means, should ask a vet or doctor, not the internet.

Please note: Regardless of the suspected species, the rule applies: after any bite from a wild animal, seek medical advice. This is a general precautionary rule and not a statement about any particular risk posed by these species.

The control campaign on the Pityusic Islands – and why it also concerns Mallorca residents

The most striking figures on this topic come not from Mallorca but from Eivissa and Formentera, the so-called Pityusic Islands. The Govern de les Illes Balears reported a significantly stepped-up control campaign for 2025:

Together, the Pityusic Islands recorded more than 4.400 captured snakes in 2025. The Director General for Medi Natural i Gestió Forestal, Ana Torres Riera, spoke of a worsening ecological emergency typical of island ecosystems and called for a permanent, coordinated and scientifically grounded response. The programme is run by COFIB, the Consorci per a la Recuperació de la Fauna Silvestre de les Illes Balears, in coordination with municipalities and island councils.

Note: These capture figures relate exclusively to Eivissa and Formentera. No comparable figures exist for Mallorca – anyone who applies them uncritically to Mallorca is confusing two different islands.

Nevertheless, it is relevant for Mallorca: it is the same species, the same route of introduction via the plant trade, and the same reporting system that COFIB uses to monitor its spread across all the Balearic Islands.

Where you're most likely to encounter a snake on Mallorca

Typical habitats include dry-stone walls, stone edges, open pine woods, garrigue scrubland, fields and quiet, little-used paths. The animals use crevices, dense undergrowth and old walls as retreats – exactly the kind of structures found on many fincas, around pools and along property boundaries. Snakes are cold-blooded and regulate their body temperature through sun and shade, which is why you're more likely to come across them during the warmer half of the year than in winter. You won't find more precise details on activity periods or seasonal patterns here: there is no reliable data on this for the species found on Mallorca, and guessing would be worthless. Anyone out hiking on Mallorca should therefore avoid thoughtlessly reaching into hard-to-see rock crevices or lifting loose stones.

Reacting correctly: what to do if you encounter one

The basic rule applies equally to any wild animal, whether in the garden, around the pool or on the path:

1. Stay calm and don't react hastily – most species avoid contact with humans on their own.
2. Keep your distance and give the animal an escape route instead of cornering it.
3. Don't touch, catch or kill it – not even if it appears to be a harmless species.
4. If possible, take a photo from a safe distance; it will help with a later report.
5. Get children and pets away from the immediate area instead of crowding the animal.
6. Then report the sighting via COFIB's Línia verde app.

Note: Calling the emergency number 112 for a snake in the garden is generally not appropriate. 112 is reserved for emergencies; the COFIB app is the right channel for reporting a routine sighting.

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Reporting snakes: The Línia verde app from COFIB

COFIB runs the reporting app Línia verde (also known as "Línea verde"), through which every citizen can directly report the sighting of an invasive species. This is not bureaucracy without effect: in the first six months, 545 reports were received through it from across the Balearics.

Among the reported animal species, the horseshoe whip snake is, according to COFIB, the most frequently reported. The 236 reports from Mallorca in half a year show that citizen reports are currently one of the most important data sources for assessing the spread on the island at all.

Most common mistakes when dealing with snakes

• Applying Pityusic Islands figures to Mallorca. The capture numbers from Eivissa and Formentera are not a Mallorca statistic.
• Catching or killing the animal yourself. According to reports, fines are threatened for protected, native species; for invasive species, the reporting route via COFIB is the correct channel.
• Lifting or moving stones and dry-stone walls to "take a look" – this destroys exactly the habitats that protected reptiles also use.
• Not reporting a sighting. Without reports, COFIB lacks the data basis to monitor the spread.
• Relying on a supposedly reliable identification by appearance, and then acting carelessly instead of generally keeping your distance.

What comes next? How the control programme continues

For the Pityuses, the Govern has announced a permanent, coordinated and scientifically based response, agreed with municipalities and island councils. For Mallorca there are no documented figures on a comparable, dedicated trap-control programme – the current data basis consists mainly of citizen reports via Línia verde. In practical terms, this means that every reported sighting from Mallorca contributes directly to assessing how far the horseshoe whip snake has already spread across the island.

Checklist for garden and finca owners

• Do not move or dismantle dry-stone walls and piles of stones on the property without good reason.
• Stay alert when working in dense scrub and along sun-warmed walls.
• If you spot one: keep your distance, take a photo from afar, and report it via the COFIB's Línia verde app.
• Explain to children that snakes should be observed but never touched.
• After being bitten by a wild animal, always seek medical advice.
• For larger building works or garden renovations involving dry-stone walls, consult a specialist firm if in doubt.

Conclusion

Snakes in Mallorca are no reason for panic, but a topic worth knowing about if you live on the island. What is officially confirmed is an ecological emergency on the Pityuses, with over 4,400 catches in 2025 – not on Mallorca. What is officially confirmed for the Balearics as a whole – and therefore also relevant to Mallorca – is that the horseshoe whip snake is the most commonly reported species, and that citizen reports via the COFIB's Línia verde app are the central data source. There is no official hazard classification for humans; the sensible response remains the same in every case: stay calm, keep your distance, do not intervene yourself, and report it.

Official sources

• Govern de les Illes Balears – announcement on the control campaign against invasive snakes on the Pityuses (2025): https://www.caib.es
• Govern de les Illes Balears – announcement on the Línia verde reporting app and the COFIB figures: https://www.caib.es
• COFIB, Consorci per a la Recuperació de la Fauna Silvestre de les Illes Balears (via caib.es)