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

Information, insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


Species Efferia aestuans

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 Efferia aestuans

Hover over black occurrence boxes to see number of images submitted. Log in to make states, months and boxes clickable.
Alabama     661    
Arkansas     2621   
Connecticut      3     
Delaware     121    
District of Columbia      1     
Florida   1  111   
Georgia    41104    
Illinois     3911    
Indiana     1      
Iowa     222    
Kansas        2   
Kentucky        2   
Louisiana    5411    
Maine      355  1 
Maryland     3982   
Massachusetts     628242   
Michigan      51    
Mississippi     82     
Missouri      61    
New Hampshire      3     
New Jersey     172    
New York     319122   
North Carolina    221041   
Ohio      910    
Oklahoma      1     
Ontario      44    
Pennsylvania     5148    
Rhode Island      252    
South Carolina    2  1    
Tennessee     42     
Texas     14     
Virginia      992   
Wisconsin      8