Ephemeroptera: Mayflies
- The characteristics of these insects, their life cycle, feeding and habitat, with illustrations.
- http://www.ento.csiro.au/education/insects/ephemeroptera.html

Ephemeroptera: The Upwinged Flies
- Photographs and information on about 12 of these flies which get their name from the way they fold their wings when at rest.
- http://www.first-nature.com/insects/ephemeroptera/index.htm

Insect Order Ephemeroptera - Mayflies
- Provides photographs of several species, descriptions and information on the life cycle of these short-lived insects.
- http://www.cirrusimage.com/ephemeroptera_mayflies.htm

Shadfly.com
- Stories, pictures, and videos of the mass emergence of shadflies (also known as mayflies, dunes, and dayflies) in North Bay, Ontario, Canada.
- http://www.shadfly.com/

Ephemeroptera
- Introduction from John R. Meyer's Entomology class.
- http://www.cals.ncsu.edu/course/ent425/compendium/mayfly.html

Mayflies of the United States
- Information on hundreds of species, including distribution maps and county checklists.
- http://www.npwrc.usgs.gov/resource/distr/insects/mfly/mflyusa.htm

Mayfly Central
- Mayfly research and resources at Purdue.
- http://www.entm.purdue.edu/Entomology/research/mayfly/mayfly.html

Gordon Ramel's Mayfly (Ephemeroptera) Page
- An introduction to biology, classification, and ecology of mayflies, the Ephemeroptera.
- http://www.earthlife.net/insects/ephemer.html

Ephemeroptera Galactica
- Information on mayflies (Ephemeroptera) for scientists and the layman.
- http://www.famu.org/mayfly