A trans-oceanic flight of over 4,200 km by painted lady butterflies

Tomasz Suchan, Clément P. Bataille, Megan S. Reich, Eric Toro-Delgado, Roger Vila, Naomi E. Pierce and Gerard Talavera ()
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Tomasz Suchan: Polish Academy of Sciences
Clément P. Bataille: University of Ottawa
Megan S. Reich: University of Ottawa
Eric Toro-Delgado: CSIC-CMCNB
Roger Vila: Institut de Biologia Evolutiva (CSIC-Univ. Pompeu Fabra)
Naomi E. Pierce: Harvard University
Gerard Talavera: CSIC-CMCNB

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract The extent of aerial flows of insects circulating around the planet and their impact on ecosystems and biogeography remain enigmatic because of methodological challenges. Here we report a transatlantic crossing by Vanessa cardui butterflies spanning at least 4200 km, from West Africa to South America (French Guiana) and lasting between 5 and 8 days. Even more, we infer a likely natal origin for these individuals in Western Europe, and the journey Europe-Africa-South America could expand to 7000 km or more. This discovery was possible through an integrative approach, including coastal field surveys, wind trajectory modelling, genomics, pollen metabarcoding, ecological niche modelling, and multi-isotope geolocation of natal origins. The overall journey, which was energetically feasible only if assisted by winds, is among the longest documented for individual insects, and potentially the first verified transatlantic crossing. Our findings suggest that we may be underestimating transoceanic dispersal in insects and highlight the importance of aerial highways connecting continents by trade winds.

Date: 2024
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DOI: 10.1038/s41467-024-49079-2

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