Overview

• Researchers tracked the butterflies' journey using meteorological data, DNA analysis, and isotope testing.
• The butterflies' flight was supported by the Saharan Air Layer, which also transports dust to the Amazon.
• Pollen analysis revealed the butterflies fed on plants specific to West Africa before their journey.
• The study highlights the butterflies' ability to alternate between active flight and wind-assisted gliding.
• The findings offer new insights into insect migration and the potential impacts of climate change.