Every summer, mayflies burst forth from lakes and rivers, taking to the skies of North America. These insects, which are particularly abundant in the northern Mississippi River Basin and Great Lakes, ...

There’s a reason why mayflies belong in the Ephemeroptera order of insects. It’s a mouthful but if you look close enough at ...

Scientists scooped sand from a riverbed in Thailand and found two nymphs of rare mayfly species not seen in 22 years, a study said. Photo from Kwanboon and Boonsoong (2025) Knee-deep in a river of ...

Mayflies by the millions are invading Ohio and swarming Lake Erie communities. Check out the video from Put-in-Bay.

"The worst day was probably last Wednesday -- every light in town had a cloud of mayflies around it at night," said Alex Kontos, marketing director for the Lakeside Association. "But we get it like ...