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Mayflies of the United States, Coordinated by Boris C. Kondratieff
Description of this resource Clickable Map of the U.S. Those who contributed photos or helped compile distribution records
County (U.S.) and state checklists Publications used to compile distribution records
Distribution maps, photos and species accounts How to cite this resource
Links to other mayfly sites Who to contact
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
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.

This resource should be cited as:

Kondratieff, Boris C. (coordinator).  2000.  Mayflies of the United States.  Jamestown, ND: Northern Prairie Wildlife Research Center Online.  http://www.npwrc.usgs.gov/resource/distr/insects/mfly/mflyusa.htm (Version 12DEC2003).

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.
Persons aware of additional publications or information on Mayflies distribution are asked to contact: 
     Dr. Boris C. Kondratieff
     C.P. Gillette Museum of Arthropod Diversity
     Department of Bioagricultural Sciences and Pest Management
     Colorado State University
     Fort Collins, CO 80523
     email: bkondrat@ceres.agsci.colostate.edu
     homepage: http://www.colostate.edu/Depts/Entomology/ent.html