Anotogaster sieboldii
In 3 days ~10% in a week ~20%
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.
Rare
Under 5% of wildlife watchers report a Jumbo Dragonfly sighting in Tokyo on a given day, based on 35 verified sightings from GBIF citizen-science data. It is the 334th 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 20%, if each day is a fresh chance.
August and September
In those months about 10% of wildlife watchers report a Jumbo Dragonfly in Tokyo on a given day, against under 5% in October to July, the lowest months.
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.
4th of 5
Of the 5 cities where we can rate Jumbo Dragonfly sightings, Tokyo ranks 4th at under 5%. The best odds are in Nagoya (Japan, about 10%), Sendai (Japan, about 10%) and Osaka (Japan, under 5%).
Same order: Odonata
The closest relatives of the Jumbo Dragonfly that you can see in Tokyo (order Odonata, Dragonflies and Damselflies) are White-Tailed Skimmer (about 30%), Greater Blue Skimmer (about 10%) and Atrocalopteryx atrata (about 10%), 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 Tokyo (35 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.
