Black Threadtail

Black Threadtail

Prodasineura autumnalis

Daily sighting probability ~10% · With luck
at Hong Kong

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

48 Verified sightings at Hong Kong
34 In all 2 parks From 2019 to 2026
May Best month
☀️ Diurnal When it's spotted

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Khao Yai National Park 🇹🇭 Thailand
~20%
2 Kaeng Krachan National Park 🇹🇭 Thailand
~10%

Cities Where Found

# City Country Daily sighting probability
1 Yogyakarta 🇮🇩 Indonesia
~30%
2 Tuen Mun 🇨🇳 China
~10%
3 Xiamen City 🇨🇳 China
~10%
4 Jakarta 🇮🇩 Indonesia
~10%
5 Hong Kong 🇨🇳 China
~10%
6 Guangzhou 🇨🇳 China
<5%

Before you go

What are the chances of seeing a Black Threadtail in Hong Kong?

With luck

About 10% of wildlife watchers report a Black Threadtail sighting in Hong Kong on a given day, based on 48 verified sightings from GBIF citizen-science data. It is the 232nd most-seen of the 1125 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 Black Threadtail in Hong Kong?

April to September

In those months about 10% of wildlife watchers report a Black Threadtail in Hong Kong on a given day, against under 5% in October to March, the lowest months. Those are among Hong Kong's wettest months, with about 190 mm of rain a month against 25 mm in December.

What time of day is best to see a Black Threadtail?

Between 10 am and 1 pm

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

Is Hong Kong the best place to see a Black Threadtail?

5th of 6

Of the 6 cities where we can rate Black Threadtail sightings, Hong Kong ranks 5th at about 10%. The best odds are in Yogyakarta (Indonesia, about 30%), Tuen Mun (China, about 10%) and Xiamen City (China, about 10%).

Where does the Black Threadtail sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Black Threadtail is recorded against all the insects logged in Hong Kong (48 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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