Paracercion calamorum
In 3 days ~30% in a week ~50%
Paracercion calamorum, the dusky lilly-squatter, is a species of damselfly in the family Coenagrionidae. It has a range that extends from southern far-eastern Russia to Japan, and to India and Indonesia. The nominate subspecies P. c. calamorum is known from central and eastern China, Korea and Japan. The subspecies P. c. dyeri occurs in southern China, Hong Kong, Taiwan, Indonesia, India, Nepal, and Thailand.
It is a medium-sized damselfly with brown-capped yellowish green eyes. Its thorax is black on dorsum without any or very fine azure blue antehumeral stripes, which are very broad in Paracercion malayanum. Lateral sides of thorax are greenish blue with a fine black line on the upper part of each lateral suture. In old males, all these marks are obscured by bluish white pruinescence. Its wings are transparent and pterostigma is yellow, framed with heavy black nervures. Its abdomen is azure blue with broad black dorsal marks up to segment 7. Segment 2 has a distinct broad dorsal spot connected narrowly to a fine apical ring. This mark will help to distinguish it from Pseudagrion species. Segment 10 has a narrow mid-dorsal black streak. Female is dull... Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Dusky Lilysquatter sighting in Beijing on a given day, based on 80 verified sightings from GBIF citizen-science data. It is the 42nd most-seen of the 401 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
In that month about 20% of wildlife watchers report a Dusky Lilysquatter in Beijing on a given day, against under 5% in September to April, the lowest months. That is one of Beijing's wettest months, with about 85 mm of rain against almost none in January.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Dusky Lilysquatter sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 12
Of the 12 cities where we can rate Dusky Lilysquatter sightings, Beijing ranks 4th at about 10%. The best odds are in Daegu (South Korea, about 30%), Daejeon (South Korea, about 10%) and Suzhou (China, about 10%).
GBIF citizen-science records
It is estimated from how often the Dusky Lilysquatter is recorded against all the insects logged in Beijing (80 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.
