Introduction from John R. Meyer's Entomology class.

Taxonomy of the mayflies, with a brief description and list of references, from Tree of Life.

Information on mayflies (Ephemeroptera) for scientists and the layman.

An introduction to biology, classification, and ecology of mayflies, the Ephemeroptera.

Fact sheet on Hexagenia spp. from Ohio State University.

Information on hundreds of species, including distribution maps and county checklists.

Mayfly research and resources at Purdue.

Stories, pictures, and videos of the mass emergence of shadflies (also known as mayflies, dunes, and dayflies) in North Bay, Ontario, Canada.