Table S1. Sampled Vanessa cardui specimens from Round-trip across the Sahara: Afrotropical Painted Lady butterflies recolonize the Mediterranean in early spring

Sampled Vanessa cardui specimens. Locality, date and ∂2H isotope values are shown. Individual assignments to each of the 6 natal groups based on a k-means clustering analysis are indicated. For those sites where migratory movements were observed, wind direction (a.g.l), migration direction and approximate migrant frequency of pass are also specified.