Brassy Longhorn

Brassy Longhorn

Nemophora metallica

Daily sighting probability <5% · Rare
at Prague

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

12 Verified sightings at Prague
29 In all 2 parks From 2019 to 2026
July Best month
☀️ Diurnal When it's spotted

About the Brassy Longhorn

Nemophora metallica is a moth of the family Adelidae. It is found in Europe. Its wingspan is 15–20 mm. The moth flies from late June to August depending on the location. The larvae feed on Knautia arvensis and Scabiosa columbaria. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Bavarian Forest National Park 🇩🇪 Germany
~10%
2 Pyrénées National Park 🇫🇷 France
<5%

Cities Where Found

# City Country Daily sighting probability
1 Prague 🇨🇿 Czechia
<5%
2 Vienna 🇦🇹 Austria
<5%
3 London 🇬🇧 United Kingdom
<5%
4 Moscow 🇷🇺 Russia
<5%

Before you go

What are the chances of seeing a Brassy Longhorn in Prague?

Rare

Under 5% of wildlife watchers report a Brassy Longhorn sighting in Prague on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 377th most-seen of the 724 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 Brassy Longhorn in Prague?

June and July

In those months about 10% of wildlife watchers report a Brassy Longhorn in Prague on a given day, against under 5% in August to May, the lowest months. Those are among Prague's wettest months, with about 80 mm of rain a month against 30 mm in February.

What time of day is best to see a Brassy Longhorn?

Between noon and 3 pm

Across all the parks we cover, that three-hour window holds the most Brassy Longhorn sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.

Is Prague the best place to see a Brassy Longhorn?

Yes

Of the 4 cities where we can rate Brassy Longhorn sightings, Prague has the highest daily chance: under 5%. Next come Vienna (Austria, under 5%) and London (United Kingdom, under 5%).

Where does the Brassy Longhorn sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Brassy Longhorn is recorded against all the insects logged in Prague (12 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.

← Back to Prague