Brown-Marmorated Longicorn Beetle

Brown-Marmorated Longicorn Beetle

Agelasta perplexa

Daily sighting probability ~10% · With luck
at Taichung

In 3 days ~20% in a week ~40%

6 Verified sightings at Taichung
11 In 1 park From 2019 to 2026
May Best month
☀️ Diurnal When it's spotted

About the Brown-Marmorated Longicorn Beetle

Agelasta perplexa is a species of beetle in the family Cerambycidae. It was described by Francis Polkinghorne Pascoe in 1858. It is known from China, Taiwan and Japan. Wikipedia →

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Taroko National Park 🇹🇼 Taiwan
~10%

More parks will be added in future updates.

Cities Where Found

# City Country Daily sighting probability
1 Taichung 🇹🇼 Taiwan
~10%
2 Taipei 🇹🇼 Taiwan
<5%

Before you go

What are the chances of seeing a Brown-Marmorated Longicorn Beetle in Taichung?

With luck

About 10% of wildlife watchers report a Brown-Marmorated Longicorn Beetle sighting in Taichung on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 155th most-seen of the 197 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.

When is the best time to see a Brown-Marmorated Longicorn Beetle in Taichung?

April to June

In those months about 10% of wildlife watchers report a Brown-Marmorated Longicorn Beetle in Taichung on a given day, against under 5% in July to March, the lowest months. Those are among Taichung's wettest months, with about 230 mm of rain a month against 40 mm in December.

What time of day is best to see a Brown-Marmorated Longicorn Beetle?

Between 7 and 10 am

Across all the parks we cover, that three-hour window holds the most Brown-Marmorated Longicorn Beetle sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.

Is Taichung the best place to see a Brown-Marmorated Longicorn Beetle?

Yes

Of the 2 cities where we can rate Brown-Marmorated Longicorn Beetle sightings, Taichung has the highest daily chance: about 10%. Next come Taipei (Taiwan, under 5%).

Where does the Brown-Marmorated Longicorn Beetle sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Brown-Marmorated Longicorn Beetle is recorded against all the insects logged in Taichung (6 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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