Banded Dark Fishfly

Nigronia fasciata · Order: Megaloptera · Family: Corydalidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Banded Dark Fishfly
Photo: Douglas Hooper, CC BY

Adults are about 2.2 to 2.8 cm long. They occur in the eastern United States and are not found in Canada.

Source: Wikipedia

Size

Typical length ranges from 22 to 28 mm.

Source: Wikipedia

Where it comes from

Found in the eastern part of the United States. The species does not occur in Canada.

Source: Wikipedia

Where it is found in the US

Recorded in 24 of 51 states and DC. Most records: Maryland, Virginia, Ohio, Tennessee, Pennsylvania, North Carolina, Kentucky, Alabama.

Darker = more records. Counts are museum and citizen-science records, not population size.

Source: GBIF

Months it is reported in the US

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Source: GBIF

More photos

Banded Dark Fishfly photo 3
Photo: jimeckert49, CC BY
Banded Dark Fishfly photo 4
Photo: David George, CC BY
Banded Dark Fishfly photo 5
Photo: DiegoH, CC BY
Banded Dark Fishfly photo 6
Photo: skitterbug, CC BY

Same family (Corydalidae)

Eastern DobsonflyEastern DobsonflyCorydalus cornutusSummer FishflySummer FishflyChauliodes pectinicornisSaw-combed FishflySaw-combed FishflyNigronia serricornisNew Zealand dobsonflyNew Zealand dobsonflyArchichauliodes diversusCorydalus armatusCorydalus armatusCorydalus armatus

Sources

  • Wikipedia: https://en.wikipedia.org/wiki/Nigronia_fasciata

Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia

Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-23.

How this page works

This is one bug's fact sheet. The colored box at the top says whether it is dangerous. Sections below cover how to recognize it, whether it is a pest, and how to deal with it. The US map shows which states have records; tap a state to see other bugs there.

Every fact on Bug FAQ comes from a named source (university extension sites, government agencies, GBIF, iNaturalist, Wikipedia). The source is linked next to each section. If we have no source for something, we leave it out.