Bug FAQLong-legged fly (Tachytrechus angustipennis)
Tachytrechus angustipennis · Order: Diptera · Family: Dolichopodidae
Tachytrechus angustipennis is a long-legged fly in the Dolichopodidae family. Adults live on algal mats in Yellowstone National Park. The species preys on eggs and larvae of the fly Paracoenia.
Source: Wikipedia
How to recognize it
Tachytrechus angustipennis belongs to the long-legged fly family Dolichopodidae.
Source: Wikipedia
Where it lives
Adults are found on algal mats at Yellowstone National Park.
Source: Wikipedia
What it eats
It is a predator that mainly eats Paracoenia eggs and larvae.
Source: Wikipedia
Where it comes from
It is distributed throughout the United States, from the West Coast to the East Coast and down to Florida.
Source: Wikipedia
Where it is found in the US
Recorded in 24 of 51 states and DC. Most records: California, Arizona, Texas, New Mexico, North Carolina, Alabama, Georgia, Hawaii.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
What does Tachytrechus angustipennis eat?
It preys on the eggs and larvae of Paracoenia.
Source: Wikipedia
Where can I find Tachytrechus angustipennis?
It occurs across the United States, including California, Utah, Washington, D.C., and Florida, and has been recorded in Hawaii and the Neotropical realm.
Source: Wikipedia
Same family (Dolichopodidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Tachytrechus_angustipennis
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.