Black Lion Fly

Black Lion Fly

Promachus painteri

Daily sighting probability ~10% · With luck
at Austin

In 3 days ~20% in a week ~30%

70 Verified sightings at Austin
15 In 1 park From 2019 to 2026
August 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 Austin?

With luck

About 10% of wildlife watchers report a Black Lion Fly sighting in Austin on a given day, based on 70 verified sightings from GBIF citizen-science data. It is the 398th most-seen of the 1624 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.

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

May to September

In those months about 10% of wildlife watchers report a Black Lion Fly in Austin on a given day, against under 5% in October to April, 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 Austin the best place to see a Black Lion Fly?

Yes

Of the 2 cities where we can rate Black Lion Fly sightings, Austin has the highest daily chance: about 10%. Next come San Antonio (United States, under 5%).

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 Austin (70 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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