Copestylum vesicularium
In 3 days ~10% in a week ~30%
Copestylum vesicularium, the iridescent bromeliad fly, is a species of syrphid fly in the family Syrphidae. This species is widely distributed on the eastern half of North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Houston | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report an Iridescent Bromeliad Fly sighting in Great Smoky Mountains National Park on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 379th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June and August–September
In those months about 10% of wildlife watchers report an Iridescent Bromeliad Fly in Great Smoky Mountains National Park on a given day, against under 5% in July and October–May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Iridescent Bromeliad Fly sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 2 parks where we can rate Iridescent Bromeliad Fly sightings, Great Smoky Mountains National Park has the highest daily chance: about 10%. Next come Shenandoah National Park (United States, under 5%).
Same family: Syrphidae
The closest relatives of the Iridescent Bromeliad Fly that you can see in Great Smoky Mountains National Park (family Syrphidae, Hover Flies) are Eastern Calligrapher (about 20%), Margined Calligrapher (about 10%) and Common Drone Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Iridescent Bromeliad Fly is recorded against all the insects logged in Great Smoky Mountains National Park (16 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.
