Butterflies are on the move as the planet warms: new research

Imagine spotting a butterfly species in your garden you have never seen before. You might take a photo and upload it to a citizen science app, or tell a local nature group about your new encounter. It feels like a small moment of joy. But if that butterfly has appeared in your backyard because its old home is becoming too hot, too dry or too damaged, the sighting is more worrying. Around the world, ongoing environmental changes are prompting many butterfly species to relocate and search for…