Adejeania vexatrix
In 3 days ~20% in a week ~40%
Adejeania vexatrix is a species of fly in the family Tachinidae. It is found in western North America from Mexico to British Columbia. In addition to its bright orange abdomen and prominent, heavy black setae, this species is noted for its greatly elongated palpi, which stick straight forward from under the fly's head. A similar looking tachinid fly, Hystricia abrupta, is found in the eastern United States. It does not have the elongated mouthparts of A. vexatrix. Paradejeania rutilioides also looks similar. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rocky Mountain National Park | 🇺🇸 United States | |
| 2 | Yellowstone National Park | 🇺🇸 United States | |
| 3 | Grand Teton National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mexico City | 🇲🇽 México |
With luck
About 10% of wildlife watchers report an Adejeania vexatrix sighting in Yellowstone National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 65th most-seen of the 160 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
August
In that month about 20% of wildlife watchers report an Adejeania vexatrix in Yellowstone National Park on a given day, against under 5% in November to July, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Adejeania vexatrix sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 parks where we can rate Adejeania vexatrix sightings, Yellowstone National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Rocky Mountain National Park (United States, about 10%).
Same order: Diptera
The closest relatives of the Adejeania vexatrix that you can see in Yellowstone National Park (order Diptera, Flies) are Common Drone Fly (about 10%) and Common Loopwing Aphideater (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Adejeania vexatrix is recorded against all the insects logged in Yellowstone National Park (20 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
