Copestylum mexicanum
In 3 days ~10% in a week ~20%
Copestylum mexicanum, the Mexican cactus fly, 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 | |
| 3 | Everglades National Park | 🇺🇸 United States | |
| 4 | Cumbres de Monterrey National Park | 🇲🇽 Mexico |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Diego | 🇺🇸 United States | |
| 2 | Los Angeles | 🇺🇸 United States | |
| 3 | Sacramento | 🇺🇸 United States | |
| 4 | Mexico City | 🇲🇽 México | |
| 5 | Monterrey | 🇲🇽 México | |
| 6 | Mesa | 🇺🇸 United States | |
| 7 | San Antonio | 🇺🇸 United States | |
| 8 | Phoenix | 🇺🇸 United States | |
| 9 | Austin | 🇺🇸 United States | |
| 10 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Mexican Cactus Fly sighting in Monterrey on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 230th most-seen of the 413 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
May–June and September
In those months about 10% of wildlife watchers report a Mexican Cactus Fly in Monterrey on a given day, against under 5% in July–August and October–April, the lowest months. Those are among Monterrey's wettest months, with about 110 mm of rain a month against 20 mm in February.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Mexican Cactus Fly sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
5th of 10
Of the 10 cities where we can rate Mexican Cactus Fly sightings, Monterrey ranks 5th at under 5%. The best odds are in San Diego (United States, about 10%), Los Angeles (United States, under 5%) and Sacramento (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Mexican Cactus Fly is recorded against all the insects logged in Monterrey (11 verified sightings), 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.
