Postcard from Sardinia: a fragile migrant

Read it on Medium (recommended). Anyone who has ever paid even a little attention to butterflies has likely encountered the painted lady, Vanessa cardui — Vanessa del cardo in Italian, la belle-dame in French. This delicately patterned orange-and-black butterfly is one of the most widespread species on Earth, found on every continent except Antarctica. A familiar sight across gardens, fields, and roadside verges, it flutters with restless energy, feeding on nectar from both wild blooms and cultivated flowers. With its intricately veined wings and erratic, windblown flight, the painted lady seems both fragile and determined — a creature of grace, but also of grit. What’s less widely known is that this delicate creature is, in fact, one of the world’s most accomplished long-distance travellers. Vanessa cardui can undertake a staggering multi-generational migration spanning up to 15,000 kilometers — the longest known insect migration route. Originating among other places in sub-Saharan Africa, successive generations of painted ladies move northward each spring, crossing the vast and inhospitable Sahara Desert, navigating the Mediterranean, and eventually reaching as far as the British Isles and the tundra of Scandinavia.