Copestylum avidum
In 3 days ~10% in a week ~30%
Copestylum avidum, the yellow-spotted bromeliad fly, is a species of syrphid fly in the family Syrphidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 2 | Big Bend National Park | 🇺🇸 United States | |
| 3 | Grand Canyon National Park | 🇺🇸 United States | |
| 4 | Saguaro National Park | 🇺🇸 United States | |
| 5 | Joshua Tree National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Diego | 🇺🇸 United States | |
| 2 | Austin | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States | |
| 4 | San Antonio | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Yellow-Spotted Bromeliad Fly sighting in Saguaro National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 167th most-seen of the 354 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.
January, March and September
In those months about 10% of wildlife watchers report a Yellow-Spotted Bromeliad Fly in Saguaro National Park on a given day, against under 5% in February, April–August and October–December, the lowest months. Those are among Saguaro National Park's wettest months, with about 45 mm of rain a month against almost none in May.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Yellow-Spotted 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.
4th of 5
Of the 5 parks where we can rate Yellow-Spotted Bromeliad Fly sightings, Saguaro National Park ranks 4th at about 10%. The best odds are in Guadalupe Mountains National Park (United States, about 20%), Big Bend National Park (United States, about 10%) and Grand Canyon National Park (United States, about 10%).
Same genus: Copestylum
The closest relatives of the Yellow-Spotted Bromeliad Fly that you can see in Saguaro National Park (genus Copestylum, Bromeliad Flies) are Copestylum marginatum (about 10%), Isabelle's Bromeliad Fly (about 10%) and Copestylum apiciferum (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-Spotted Bromeliad Fly is recorded against all the insects logged in Saguaro 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.
