Terellia occidentalis

Terellia occidentalis · Order: Diptera · Family: Tephritidae

No source yet on danger. We have no source yet on whether it bites, stings or damages anything.
Terellia occidentalis
Photo: iNaturalist user, CC0

Terellia occidentalis is a fruit-fly in the family Tephritidae and the genus Terellia. It occurs in Canada and the United States.

Source: Wikipedia

How to recognize it

Terellia occidentalis belongs to the fruit-fly family Tephritidae and is placed in the genus Terellia.

Source: Wikipedia

Where it comes from

This species is found in Canada and the United States.

Source: Wikipedia

Where it is found in the US

Recorded in 13 of 51 states and DC. Most records: California, Nevada, Washington, Arizona, Colorado, Utah, Idaho, Oregon.

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

Source: GBIF

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

Months it is reported in the US

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Source: GBIF

More photos

Terellia occidentalis photo 2
Photo: Jared Shorma, CC BY
Terellia occidentalis photo 3
Photo: Wendy McCrady, CC BY
Terellia occidentalis photo 4
Photo: Colin Croft, CC BY
Terellia occidentalis photo 5
Photo: Wendy McCrady, CC BY

Same family (Tephritidae)

Goldenrod Gall FlyGoldenrod Gall FlyEurosta solidaginisThistle Stem Gall FlyThistle Stem Gall FlyUrophora carduiGoldenrod Brussels Sprout Gall FlyGoldenrod Brussels Sprout Gall FlyProcecidochares atraMediterranean Fruit FlyMediterranean Fruit FlyCeratitis capitataDamages trees, gardens or cropsCotton-gall TephritidCotton-gall TephritidAciurina bigeloviaeOriental Fruit FlyOriental Fruit FlyBactrocera dorsalisDamages trees, gardens or crops

Sources

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

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

Text written 2026-10-26 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-26.

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.