Black Lion Fly

Black Lion Fly

Promachus painteri

Daily sighting probability <5% · Rare
at San Antonio

In 3 days ~10% in a week ~20%

15 Verified sightings at San Antonio
15 In 1 park From 2019 to 2026
June Best month
☀️ Diurnal When it's spotted

About the Black Lion Fly

Promachus painteri is a species of robber flies (insects in the family Asilidae). Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Cumbres de Monterrey National Park 🇲🇽 Mexico
~10%

More parks will be added in future updates.

Cities Where Found

# City Country Daily sighting probability
1 Austin 🇺🇸 United States
~10%
2 San Antonio 🇺🇸 United States
<5%

Before you go

What are the chances of seeing a Black Lion Fly in San Antonio?

Rare

Under 5% of wildlife watchers report a Black Lion Fly sighting in San Antonio on a given day, based on 15 verified sightings from GBIF citizen-science data. It is the 393rd most-seen of the 697 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.

When is the best time to see a Black Lion Fly in San Antonio?

June

In that month about 10% of wildlife watchers report a Black Lion Fly in San Antonio on a given day, against under 5% in July to May, the lowest months.

What time of day is best to see a Black Lion Fly?

Between 11 am and 2 pm

Across all the parks we cover, that three-hour window holds the most Black Lion 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.

Is San Antonio the best place to see a Black Lion Fly?

2nd of 2

Of the 2 cities where we can rate Black Lion Fly sightings, San Antonio ranks 2nd at under 5%. The best odds are in Austin (United States, about 10%).

Where does the Black Lion Fly sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Black Lion Fly is recorded against all the insects logged in San Antonio (15 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.

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