KELLETTVILLE, Pa. ― Every year in late June, Peggy Butler and her husband, Ken, welcome visitors to rural northwestern Pennsylvania for the chance to glimpse the rare and beguiling Photinus carolinus.

Learn how fireflies synchronize their flashes — and how that natural coordination could inspire future small‑scale robotics.

In Taiwan’s forests, researchers discovered a clever hunting trick by the sheet web spider Psechrus clavis. Instead of immediately devouring captured fireflies, the spiders allow them to glow in the ...

List of species by scientific name -- Preface: For the awe of it -- Acknowledgments -- What genus is it? -- Fireflies around the world -- Frequently asked questions -- Eggs, larvae, and pupae -- ...