Sources: Modified from Randolph & McCafferty (1998), and
Data from Ohio EPA by Sarah Becker, Assessment and Modeling Section of OEPA.
Data from Ohio EPA by Sarah Becker, Assessment and Modeling Section of OEPA.
Atlas of Ohio Mayflies
The purpose of this atlas is to enable the collector to find a partular species;
therefore not all streams in a county where the species may be found are listed.
Only the latest record, since 2010, for each county is given for many species;
if there are no records since 2010, earlier data are given.
(Search for Location by Family through Frame to the Left
Search for mayfly species by County by clicking on the Map to Right)
Recent Update 01/19/2021 All counties covered with current data.