Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

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  8115128937 2
Alaska    1105     
Alberta   13241414116   
Arizona  10181618816131939
Arkansas  17237316114  
British Columbia4  1325272312182 3
California32847791126879363018291
Colorado 2257312191953  
Connecticut  1364599   
Delaware   24112     
District of Columbia    2       
Florida1875978978749
Georgia 61522181498922 
Idaho    21325   
Illinois  1102229253016 2 
Indiana 99791213322  
Iowa 2 1194354288   
Kansas  5 361394   
Kentucky  1419872    
Louisiana 33795625   
Maine 22517191112413  
Manitoba1   15452   
Maryland3 6399589904420121 
Massachusetts 16974121967262211  
Michigan   3613309 2  
JanFebMarAprMayJunJulAugSepOctNovDec
Minnesota    84233179   
Mississippi    3 1  1  
Missouri  17822191895  
Montana 56519727791 3 
Nebraska 7 233171681  
Nevada73623311    
New Brunswick    66272112 
New Hampshire 2115557245113133  
New Jersey  154321613843  
New Mexico3 4213102 53 
New York  22556685024163  
Newfoundland/Labrador    151425    
North Carolina  23521519101212432
North Dakota    16196 1  
Northwest Territories     32     
Nova Scotia     24 1   
Ohio  1211141935   
Oklahoma   43241523331 
Ontario10423307373481994 
Oregon191016514027341916 3
Pennsylvania  324917985431133 
Quebec    552142001338210  
Rhode Island   2249294   
Saskatchewan    9111917  2 
South Carolina 26174711231  
South Dakota   2   1    
JanFebMarAprMayJunJulAugSepOctNovDec
Tennessee 22237303668291695 
Texas4419306634102527208 
Utah   2 33102   
Vermont  710232012335  
Virginia213510010915816011752105231017
Washington  4302425324165  
West Virginia   44229612  
Wisconsin   2164741101   
Wyoming     2464   
Yukon Territory    11