Eastern Lion Fly

Eastern Lion Fly

Promachus rufipes

Daily sighting probability <5% · Rare
at Baltimore

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

11 Verified sightings at Baltimore
130 In all 3 parks From 2019 to 2026
August Best month
☀️ Diurnal When it's spotted

About the Eastern Lion Fly

Promachus rufipes, known generally as the red-footed cannibalfly or bee panther, is a species of robber fly (insects in the family Asilidae). Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Congaree National Park 🇺🇸 United States
~20%
2 Shenandoah National Park 🇺🇸 United States
~10%
3 Great Smoky Mountains National Park 🇺🇸 United States
~10%

Cities Where Found

# City Country Daily sighting probability
1 Washington 🇺🇸 United States
~10%
2 Baltimore 🇺🇸 United States
<5%

Before you go

What are the chances of seeing an Eastern Lion Fly in Baltimore?

Rare

Under 5% of wildlife watchers report an Eastern Lion Fly sighting in Baltimore on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 374th most-seen of the 705 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 an Eastern Lion Fly in Baltimore?

August and September

In those months about 10% of wildlife watchers report an Eastern Lion Fly in Baltimore on a given day, against under 5% in October to July, the lowest months.

What time of day is best to see an Eastern Lion Fly?

Between 11 am and 2 pm

Across all the parks we cover, that three-hour window holds the most Eastern 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 Baltimore the best place to see an Eastern Lion Fly?

2nd of 2

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

Where does the Eastern Lion Fly sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Eastern Lion Fly is recorded against all the insects logged in Baltimore (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.

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