Copestylum isabellina
In 3 days ~30% in a week ~60%
Copestylum isabellina, or Isabelle's bromeliad fly, is a species of syrphid fly in the family Syrphidae.They have been observed in the Southwestern North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report an Isabelle's Bromeliad Fly sighting in Saguaro National Park on a given day, based on 63 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 42nd most-seen of the 354 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
November to January
In those months about 20% of wildlife watchers report an Isabelle's Bromeliad Fly in Saguaro National Park on a given day, against about 10% in February to October, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Isabelle's Bromeliad Fly sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Saguaro National Park, in our data
Saguaro National Park is the only park on Wallace's Line with enough records to rate Isabelle's Bromeliad Fly sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Copestylum
The closest relatives of the Isabelle's Bromeliad Fly that you can see in Saguaro National Park (genus Copestylum, Bromeliad Flies) are Copestylum marginatum (about 10%), Copestylum apiciferum (about 10%) and Copestylum fornax (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Isabelle's Bromeliad Fly is recorded against all the insects logged in Saguaro National Park (63 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.
