Vespa ducalis
In 3 days ~10% in a week ~30%
Vespa ducalis, the black-tailed hornet, is a species of hornet in the genus Vespa. It was described by Smith in 1852. In Japan, it is called himesuzumebachi (姫雀蜂; literally: "princess sparrow wasp"). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Black-Tailed Hornet sighting in Tokyo on a given day, based on 64 verified sightings from GBIF citizen-science data. It is the 199th most-seen of the 1013 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June to October
In those months about 10% of wildlife watchers report a Black-Tailed Hornet in Tokyo on a given day, against under 5% in November to May, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Black-Tailed Hornet sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
6th of 11
Of the 11 cities where we can rate Black-Tailed Hornet sightings, Tokyo ranks 6th at about 10%. The best odds are in Hefei (China, about 20%), Taichung (Taiwan, about 10%) and Taipei (Taiwan, about 10%).
Same genus: Vespa
The closest relatives of the Black-Tailed Hornet that you can see in Tokyo (genus Vespa, Hornets) are Yellow-Vented Hornet (about 10%), Asian Giant Hornet (about 10%) and Yellow Hornet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black-Tailed Hornet is recorded against all the insects logged in Tokyo (64 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.
