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

Interested in a 2022 BugGuide gathering in New Mexico?

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 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.

Previous events


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     6121    
Arkansas     2621   
Connecticut      4     
Delaware     121    
District of Columbia      1     
Florida   1  111   
Georgia    41114    
Illinois     31011    
Indiana     1 1    
Iowa     222    
Kansas        2   
Kentucky        2   
Louisiana    5411    
Maine      355  1 
Maryland     31182   
Massachusetts1    936272   
Michigan      81    
Mississippi     82     
Missouri      61    
New Hampshire     1121    
New Jersey     182    
New York     319152   
North Carolina    221041   
Ohio      9101   
Oklahoma      1     
Ontario      74    
Pennsylvania     51411    
Rhode Island      282    
South Carolina    2  1  1 
Tennessee     43     
Texas     34     
Virginia      9132   
Wisconsin      114