Butterfly wings may be quite thin, but they are also durable and strong. This strength comes from the material that makes up the wings: chitin (pronounced kite-in). Chitin is a kind of building ...

More than 20 years of habitat restoration and breeding programs have helped the endangered Karner blue butterfly make a comeback in the pine barrens of upstate New York where it was discovered by ...

So tiny you’d probably never notice them, the El Segundo blue butterfly seems to be turning into an ecological success story. And biologist Ann Dalkey aims to keep the trend going. She recently led a ...