Copestylum fornax
In 3 days ~10% in a week ~30%
Copestylum fornax is a species of syrphid fly in the family Syrphidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States | |
| 2 | Big Bend National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Phoenix | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Copestylum fornax sighting in Big Bend National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 283rd most-seen of the 329 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.
July and November–January
In those months about 10% of wildlife watchers report a Copestylum fornax in Big Bend National Park on a given day, against under 5% in February–June and August–October, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Copestylum fornax sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Copestylum fornax sightings, Big Bend National Park ranks 2nd at under 5%. The best odds are in Saguaro National Park (United States, about 10%).
Same genus: Copestylum
The closest relatives of the Copestylum fornax that you can see in Big Bend National Park (genus Copestylum, Bromeliad Flies) are Yellow-Spotted Bromeliad Fly (about 10%), Copestylum marginatum (about 10%) and Mexican Cactus Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Copestylum fornax is recorded against all the insects logged in Big Bend National Park (5 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.
