Residents and visitors across Pollensa, Alcúdia, Sa Pobla and other parts of northern Mallorca may have noticed something remarkable in recent days, thousands upon thousands of butterflies filling fields, roadsides and gardens, and what a sight it has been!
The species responsible is the Painted Lady butterfly (Vanessa cardui), one of the world’s great migratory insects. Far from appearing by chance, these butterflies are part of an extraordinary natural phenomenon that begins thousands of kilometres away.
A Journey That Starts in Africa
According to naturalists and recent scientific studies, exceptional winter rains across North Africa, particularly in the Maghreb region, created ideal conditions for the species this year.
More rain means more vegetation, especially thistles and other plants on which Painted Lady caterpillars feed. More food leads to more caterpillars, more chrysalises and, eventually, many more butterflies. Their numbers can increase dramatically in just a few generations.
A similar population explosion was recorded in 2019, and 2026 appears to be another exceptional year.
Why Are They Arriving in Mallorca?
As spring progresses, successive generations of Painted Ladies begin moving north. Assisted by favourable southerly winds, enormous numbers cross the Mediterranean in search of fresh breeding grounds.
Mallorca is often the first land they encounter after leaving North Africa, making the island an important stop on one of Europe’s most impressive migration routes.
In recent days, naturalists at S’Albufera de Mallorca have reported tens of thousands of these butterflies across the north of the island, with many stopping to feed and rest before continuing their journey.
Perhaps the most remarkable aspect of this phenomenon is that no single butterfly completes the entire migration. Instead, generation after generation continues the journey north, creating a vast annual cycle that can exceed 15,000 kilometres from sub-Saharan Africa to Scandinavia. Along the way, these remarkable travellers cross deserts and seas before reaching places such as Mallorca, where they pause to feed and continue an equally important role as pollinators.
Every flower they visit contributes to the health of Mediterranean ecosystems, making their arrival far more than just a beautiful spectacle. For many residents and visitors, witnessing thousands of butterflies at once is a rare experience and a reminder that northern Mallorca lies on one of nature’s most extraordinary migration routes.
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