When butterflies not native to South America appeared on a beach in French Guiana, entomologists started sleuthing to prove where they came from—and how they might have got there.
https://www.wired.com/story/butterflies-fly-4200-kilometers-without-stopping-nonstop-migration-painted-lady/?utm_source=dlvr.it&utm_medium=blogger
https://www.wired.com/story/butterflies-fly-4200-kilometers-without-stopping-nonstop-migration-painted-lady/?utm_source=dlvr.it&utm_medium=blogger