Vespula flaviceps
In 3 days ~30% in a week ~50%
Vespula flaviceps is a species of social wasp in the genus Vespula. It found in Eastern Asia and Japan. Studies have suggested that the queens of this species may mate with more males and use sperm more evenly. The reason for this is not yet well understood.
V. flaviceps is native to Eastern Asia and Japan. It can be found most prominently on the Japanese Islands, but is also present in South Korea and the southern portion of Primorsky Krai. Its population may be threatened by invasive raccoons, which prey upon it during the summer and autumn.
V. flaviceps is found in forests. During a two-year study in Japan, the species was observed to be one of... Wikipedia →
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Common Asian Yellowjacket sighting in Nanjing on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 93rd most-seen of the 272 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
October and December
In those months about 20% of wildlife watchers report a Common Asian Yellowjacket in Nanjing on a given day, against under 5% in January, June and August, the lowest months. Those are among Nanjing's driest months, with about 50 mm of rain a month against 240 mm in July.
4th of 9
Of the 9 cities where we can rate Common Asian Yellowjacket sightings, Nanjing ranks 4th at about 10%. The best odds are in Guiyang (China, about 30%), Hefei (China, about 20%) and Kunming (China, about 10%).
Same family: Vespidae
The closest relatives of the Common Asian Yellowjacket that you can see in Nanjing (family Vespidae, Hornets, Paper Wasps, Potter Wasps, and Allies) are Yellow-Legged Hornet (about 20%), Black-Bellied Hornet (about 20%) and European Hornet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Asian Yellowjacket is recorded against all the insects logged in Nanjing (14 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.
