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

Discussion, insects and people from the 2018 BugGuide 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

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


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    31104    
Illinois     3710    
Indiana     1      
Iowa     222    
Kansas        2   
Kentucky        2   
Louisiana    5411    
Maine      355  1 
Maryland     2922   
Massachusetts     625222   
Michigan      51    
Mississippi     82     
Missouri      61    
New Hampshire      3     
New Jersey     172    
New York     315122   
North Carolina    22941   
Ohio      910    
Oklahoma      1     
Ontario      41    
Pennsylvania     5156    
Rhode Island      252    
South Carolina       1    
Tennessee     2      
Texas     14     
Virginia      682   
Wisconsin      8