Heliocypha perforata
In 3 days ~10% in a week ~20%
Heliocypha perforata, also known by its common name common blue jewel, is a species of damselfly from the genus Heliocypha. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Sok National Park | 🇹🇭 Thailand | |
| 2 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 3 | Khao Yai National Park | 🇹🇭 Thailand |
Rare
Under 5% of wildlife watchers report a Common Blue Jewel sighting in Taipei on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 570th most-seen of the 765 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.
January
In that month about 10% of wildlife watchers report a Common Blue Jewel in Taipei on a given day, against under 5% in February to December, the lowest months. That is one of Taipei's driest months, with about 95 mm of rain against 270 mm in June.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Common Blue Jewel sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 cities where we can rate Common Blue Jewel sightings, Taipei ranks 3rd at under 5%. The best odds are in Hong Kong (China, about 10%) and Tuen Mun (China, about 10%).
Same order: Odonata
The closest relatives of the Common Blue Jewel that you can see in Taipei (order Odonata, Dragonflies and Damselflies) are Neurothemis taiwanensis (about 30%), Crimson-Tailed Marsh Hawk (about 20%) and Blue-Tailed Forest Hawk (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Blue Jewel is recorded against all the insects logged in Taipei (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.
