Idana marginata

Idana marginata · Order: Diptera · Family: Ulidiidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Idana marginata
Photo: Matt Pelikan, CC BY

The species can grow longer than 10 mm, making it one of the larger ulidiid flies in eastern North America. It is found across the United States and Canada.

Source: Wikipedia

Size

Adults can reach lengths over 10 mm (about 0.39 in).

Source: Wikipedia

Where it comes from

Idana marginata occurs in both the United States and Canada.

Source: Wikipedia

Where it is found in the US

Recorded in 24 of 51 states and DC. Most records: New York, Pennsylvania, Ohio, Indiana, Massachusetts, New Jersey, Virginia, Illinois.

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

Source: GBIF

Status: native in North America; native in United States; native in Canada. Source: iNaturalist

Months it is reported in the US

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Source: GBIF

More photos

Idana marginata photo 2
Photo: Healthy Yards, CC BY
Idana marginata photo 3
Photo: Benny Albro, CC BY
Idana marginata photo 4
Photo: John Abrams, CC BY
Idana marginata photo 5
Photo: iNaturalist user, CC0

Same family (Ulidiidae)

Common Picture-winged FlyCommon Picture-winged FlyDelphinia pictaPeacock FlyPeacock FlyCallopistromyia annulipesPicture-winged FlyPicture-winged FlyPhysiphora alceaeNarrow-Banded Picture-Winged FlyNarrow-Banded Picture-Winged FlyCeroxys latiusculusBlack Onion FlyBlack Onion FlyTritoxa flexaTritoxa incurvaTritoxa incurva

Sources

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

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

Text written 2026-10-25 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-25.

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.