Anotogaster sieboldii
In 3 days ~30% in a week ~50%
Anotogaster sieboldii, as known as golden-ringed dragonfly, jumbo dragonfly, Siebold's dragonfly or oniyanma (オニヤンマ、鬼蜻蜓、馬大頭) in Japanese, 無霸勾蜓 in Chinese and 장수잠자리 ("jang-su-jamjari", means 'General Dragonfly') in Korean is the largest species of dragonfly native to Eastern Asia, especially Japan, Taiwan, China, Korean Peninsula. It can grow between 95 and 100 mm in length. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Jumbo Dragonfly sighting in Nagoya on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 166th most-seen of the 195 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.
July
In that month about 20% of wildlife watchers report a Jumbo Dragonfly in Nagoya on a given day, against under 5% in August and October–May, the lowest months. That is one of Nagoya's wettest months, with about 230 mm of rain against 75 mm in January.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Jumbo Dragonfly sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 5 cities where we can rate Jumbo Dragonfly sightings, Nagoya has the highest daily chance: about 10%. Next come Sendai (Japan, about 10%) and Osaka (Japan, under 5%).
Same order: Odonata
The closest relatives of the Jumbo Dragonfly that you can see in Nagoya (order Odonata, Dragonflies and Damselflies) are White-Tailed Skimmer (about 40%), Wandering Glider (about 30%) and Atrocalopteryx atrata (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Jumbo Dragonfly is recorded against all the insects logged in Nagoya (5 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.
