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Order Ephemeroptera - Mayflies


The information below is based on images submitted and identified by contributors. Range and date information may be incomplete, overinclusive, or just plain wrong.

Contributed Images Map No Images   Images
Range map for Mayflies

Hover over black occurrence boxes to see number of images submitted. Log in to make states, months and boxes clickable.
JanFebMarAprMayJunJulAugSepOctNovDec
Alabama  8127128947 2
Alaska    1135     
Alberta   13241415116   
Arizona1312212318917171939
Arkansas1 18337317113  
British Columbia5 11627358051195 3
California8286183132811054149263910
Colorado 2259517272665  
Connecticut  3469599   
Delaware   24112     
District of Columbia    2       
Florida18121614108107816913
Georgia361724191498932 
Idaho   321436   
Illinois  110363139412122 
Indiana 997131513322  
Iowa 2 9295762348   
Kansas  5 361394   
Kentucky  1419972    
Louisiana 3810951138  1
Maine 22517191114513 1
Manitoba1   17564   
Maryland3 961104961015331123 
Massachusetts 161177131987863241  
Michigan   4614371012  
JanFebMarAprMayJunJulAugSepOctNovDec
Minnesota    847371712   
Mississippi  2 3 1  1  
Missouri  18824241996  
Montana 56519728822 6 
Nebraska 7 2343431111  
Nevada73623511    
New Brunswick    67272112 
New Hampshire 2115559245213133  
New Jersey  154331814843  
New Mexico4242161864531
New York  225607957282231 
Newfoundland/Labrador    151425    
North Carolina 428542126144517452
North Dakota    16196 1  
Northwest Territories     32     
Nova Scotia   1 7411   
Ohio  1311152335 1 
Oklahoma   43241521331 
Ontario10423339183552394 
Oregon191423514546342225 3
Pennsylvania 3333102115100521533 
Quebec    682542361388310  
Rhode Island   22412297   
Saskatchewan    91123221 2 
South Carolina 29174711231  
South Dakota   2   11   
JanFebMarAprMayJunJulAugSepOctNovDec
Tennessee 22240364074291695 
Texas442031683810252826164
Utah   2 46102   
Vermont  710232112335  
Virginia213510211216016511752105261017
Washington  4362530344165  
West Virginia   54249612  
Wisconsin  18185448124   
Wyoming   1 6474   
Yukon Territory    11