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Introduction

This Web site is a "work in progress," consisting of information on the known distribution of Mayflies in the United States. Distribution maps and county checklists were created by extracting information on Mayfly distribution from publications listed in References. Users of the Web site should recognize that lack of a confirmed sighting in a given county does not necessarily mean that the species is absent from that county.

Because it is a "work in progress," the Mayflies of the United States Web site is constantly being updated. Additional families, photos, and species accounts will be added as funds and time permit, and distribution maps of species that are already covered are being updated as new county records are established. Distribution maps are currently limited to states of the conterminous United States. Persons with knowledge of additional publications or information on Mayfly distribution are asked to contact the project coordinator at the address given below.

Checklists

Checklists of all species reported in a particular county or region

Distribution Maps

United States (Combined Maps)

Combined maps for Mayflies occurring in the conterminous U.S.

Great Plains

Colorado -- Iowa -- Kansas -- Minnesota -- Missouri -- Montana -- Nebraska -- New Mexico -- North Dakota -- Oklahoma -- South Dakota -- Texas -- Wyoming

East of Great Plains

Alabama -- Arkansas -- Connecticut -- Delaware -- Florida -- Georgia -- Illinois -- Indiana -- Kentucky -- Louisiana -- Maine -- Maryland -- Massachusetts -- Michigan -- Mississippi -- New Hampshire -- New Jersey -- New York -- North Carolina -- Ohio -- Pennsylvania -- Rhode Island -- South Carolina -- Tennessee -- Vermont -- Virginia -- West Virginia -- Wisconsin

West of Great Plains

Arizona -- California -- Idaho -- Nevada -- Oregon -- Utah -- Washington

Other Mayfly Information

Links to other Mayfly resources on the Internet

Acknowledgments

References

Publications used to compile distribution records and aid in the construction of this resource, as well as those with general information about mayflies

This resource is based on the following sources: See References.

Disclaimer: Maps and checklists presented on this Web site were created by manually coding information in the source publications. Maps were inspected for gross errors, but there is a possibility that some errors remain. Users of the Web site should recognize that lack of a confirmed sighting in a given county does not necessarily mean that the species is absent from that county.