Copestylum marginatum
In 3 days ~20% in a week ~40%
Copestylum marginatum is a species of syrphid fly in the family Syrphidae. This species has been observed in Southwestern North America. 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 | San Diego | 🇺🇸 United States | |
| 2 | Los Angeles | 🇺🇸 United States | |
| 3 | San Antonio | 🇺🇸 United States | |
| 4 | Austin | 🇺🇸 United States | |
| 5 | Mexico City | 🇲🇽 México | |
| 6 | San Francisco | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Copestylum marginatum sighting in Big Bend National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 155th most-seen of the 329 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.
September
In that month about 20% of wildlife watchers report a Copestylum marginatum in Big Bend National Park on a given day, against under 5% in August and December–February, the lowest months. That is one of Big Bend National Park's wettest months, with about 50 mm of rain against 10 mm in April.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Copestylum marginatum sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Copestylum marginatum sightings, Big Bend National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Saguaro National Park (United States, about 10%).
Same genus: Copestylum
The closest relatives of the Copestylum marginatum that you can see in Big Bend National Park (genus Copestylum, Bromeliad Flies) are Yellow-Spotted Bromeliad Fly (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 marginatum is recorded against all the insects logged in Big Bend National Park (12 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.
