What's That Bug? does not endorse extermination

Subject:  Weird butterfly creature
Geographic location of the bug:  Kingston Ontario Canada
Date: 02/08/2018
Time: 05:35 PM EDT
Your letter to the bugman:  This weird bug was hanging around my dock in June. It had a very long body, and was pretty clumsy when it flew. It looked as though its body was to heavy to support it. It hung out in the cedars for a long time and then disappeared. I have tried to figure out what it is through google, a bug book and friends and no one has a clue! Hoping you can help!
How you want your letter signed:  Martha

Dark Fishfly

Dear Martha,
This is not a butterfly.  It is a Dark Fishfly in the genus
Nigronia which is pictured on BugGuide where it states:  “Emergence of adults may be synchronized. Adults are diurnal (seen flying near streams) and also nocturnal, so come to lights. Eggs are laid on the underside of vegetation overhanging a stream. Larvae are aquatic, predatory. Perhaps take three years to mature in more temperate areas, such as West Virginia. Pupation occurs in earthen cells on the edge of streams.”

What's That Bug? does not endorse extermination
Location: Kingston, Ontario, Canada

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