Excessive vegetation in Arabia triggered massive butterfly migrations in 2019 across Europe and Africa: Study

Throughout much of 2019, Europe was filled with migrating butterflies. Specifically, millions of Vanessa cardui butterflies (the painted lady) created an extraordinary natural spectacle that left a lasting impression on the collective memory of many countries. Now, an international team of researchers have unraveled the origin of this demographic explosion and how these butterflies spread across several continents.