Pseudagrion microcephalum
In 3 days ~20% in a week ~40%
The blue riverdamsel, Pseudagrion microcephalum is a common species of damselfly in the family Coenagrionidae. It is also known as the blue sprite and blue grass dart. For many years, Pseudagrion microcephalum was considered to be a widespread species occurring across southern and eastern Asia, Australasia and the Pacific.
In 2026, Malte Seehausen and Milen Marinov reviewed the Pseudagrion microcephalum species complex and restricted Pseudagrion microcephalum to populations from the Indian subcontinent and Sri Lanka. As part of this revision, Australian, Papuan and Pacific populations previously identified as Pseudagrion microcephalum were reassigned to several distinct species, including Pseudagrion crenatum in Australia and New Guinea. Other populations from Southeast Asia and the western Pacific were also reassigned to newly recognised regional species.
This species can be found in India and Sri Lanka. It is a medium-sized damselfly with pale blue eyes, dark on top. They grow to 38mm in length. Its thorax is azure blue with black, broad dorsal stripes and narrow humeral stripes. Abdominal segments 1 and 2 are blue with... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sepilok | 🇲🇾 Malaysia |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kochi | 🇮🇳 India | |
| 2 | Singapore | 🇸🇬 Singapore | |
| 3 | Thrissur | 🇮🇳 India | |
| 4 | Thiruvananthapuram | 🇮🇳 India | |
| 5 | Kuching | 🇲🇾 Malaysia | |
| 6 | Denpasar | 🇮🇩 Indonesia | |
| 7 | Colombo [Sri Jayawardenepura Kotte] | 🇱🇰 Sri Lanka | |
| 8 | Kollam | 🇮🇳 India | |
| 9 | Taichung | 🇹🇼 Taiwan | |
| 10 | Kolkata | 🇮🇳 India |
With luck
About 10% of wildlife watchers report a Blue Riverdamsel sighting in Chennai on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 188th most-seen of the 376 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
March and August–January
In those months about 10% of wildlife watchers report a Blue Riverdamsel in Chennai on a given day, against under 5% in February and April–July, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Blue Riverdamsel sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
16th of 18
Of the 18 cities where we can rate Blue Riverdamsel sightings, Chennai ranks 16th at about 10%. The best odds are in Kochi (India, about 20%), Singapore (Singapore, about 20%) and Thrissur (India, about 20%).
GBIF citizen-science records
It is estimated from how often the Blue Riverdamsel is recorded against all the insects logged in Chennai (13 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.
