Rhyothemis fuliginosa
In 3 days ~30% in a week ~50%
Rhyothemis fuliginosa, also known as the butterfly dragonfly or the butterfly flutterer, is a species of dragonfly of the family Libellulidae found throughout East Asia, in the countries of Japan, China, Taiwan, and the Korean Peninsula.
In Japan, R. fuliginosa is known as チョウトンボ (chou-tonbo, 蝶蜻蛉) which directly translates to "butterfly dragonfly." In China and Taiwan, it is known as 黑翅蜻蜓 (Hēi chì qīngtíng), meaning "black-winged dragonfly." In Korea it is also known as 나비잠자리 (Nabi jamjari) meaning "butterfly dragonfly".
Flights occur between the months of June and September. They are most active from early summer to the mid-autumn season. Rhyothemis fuliginosa is a short and stout dragonfly with a body length of 32-41 millimeters in length. The wings are 30–40 mm across and patterned with a deep blue iridescent shade. Depending on the viewing angle, the dragonfly's wings can vary in color due to their light scattering properties, with some appearing golden in the light. The wing patterns are thought to be a determinant between members of the same species to avoid mating with the incorrect partner.
Males have spots on the tips of their hindwings, a feature that allows... Wikipedia →
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Butterfly Flutterer sighting in Nanjing on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 89th 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.
June and July
In those months about 20% of wildlife watchers report a Butterfly Flutterer in Nanjing on a given day, against under 5% in September to April, the lowest months. Those are among Nanjing's wettest months, with about 210 mm of rain a month against 40 mm in December.
8th of 12
Of the 12 cities where we can rate Butterfly Flutterer sightings, Nanjing ranks 8th at about 10%. The best odds are in Hiroshima (Japan, about 20%), Daegu (South Korea, about 20%) and Suzhou (China, about 20%).
Same family: Libellulidae
The closest relatives of the Butterfly Flutterer that you can see in Nanjing (family Libellulidae, Skimmers) are Wandering Glider (about 10%), Pied Skimmer (about 10%) and White-Tailed Skimmer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Butterfly Flutterer is recorded against all the insects logged in Nanjing (16 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.
