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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Flatheaded Mayflies (Heptageniidae)

Family Heptageniidae - Flatheaded 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 Flatheaded Mayflies
Credits: Generated with MapServer. BugGuide integration kindly provided by Mike Boone.

Hover over black occurrence boxes to see number of images submitted. Log in to make states, months and boxes clickable.
JanFebMarAprMayJunJulAugSepOctNovDec
Alabama  57212322  
Alberta   7 262    
Arizona  1 112     
Arkansas1 6   234   
British Columbia2  12183    
California 441630181429 2 
Colorado 25  2461   
Connecticut   243185   
Delaware   2        
Florida7 11 12  3 1
Georgia 169 12 21  
Idaho      1 2   
Illinois   12112171242  
Indiana 63210352    
Iowa    16231592   
Kansas  5 154 2   
Kentucky  14523     
Louisiana  351 311   
Maine 2  37251   
Manitoba      1 1   
Maryland   294551401588  
Massachusetts 329211927133   
Michigan    1573    
Minnesota    17734   
Missouri  13677431  
JanFebMarAprMayJunJulAugSepOctNovDec
Montana 11111816  1 
Nebraska     12131  
Nevada    12      
New Brunswick    22101    
New Hampshire  1111251623   
New Jersey   17785 2  
New Mexico    11      
New York   3133915831  
North Carolina  63261018423 
North Dakota     32     
Nova Scotia     5      
Ohio    456 1   
Oklahoma   217781   
Ontario3  193732171243 
Oregon   3241541032 1
Pennsylvania   852585530633 
Quebec    211237656121  
Rhode Island       10    
Saskatchewan       3    
South Carolina 11815 12    
Tennessee  92621163420515 
Texas113745142 2 
Vermont  379861 2  
Virginia8437315345311033112
Washington   8110101231  
West Virginia    23 4 2  
JanFebMarAprMayJunJulAugSepOctNovDec
Wisconsin    123175    
Wyoming     1 1    

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

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