shadfly

[ shad-flahy ]
/ ˈʃædˌflaɪ /
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noun, plural shad·flies.

Origin of shadfly

An Americanism dating back to 1830–40; so called because they hatch at the time of year when shad are running
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for shadfly

  • We met with ephemer (shadfly) midway, about a mile from the shore, and they evidently fly over the whole lake.

    The Maine Woods|Henry David Thoreau