Aciagrion occidentale
In 3 days ~10% in a week ~30%
Aciagrion occidentale, green striped slender dartlet, is a species of damselfly in the family Coenagrionidae. It is found in India, Sri Lanka, Maldives, Vietnam and Thailand. It is a long slender damselfly with a black spot in blue on the 8th segment of the abdomen. Its thorax is black with lateral azure blue stripes. Its abdomen is extremely slender with black on dorsum of segments 1 to 7 and light blue on the lateral sides. Segment 8 is blue with a narrow triangle black dorsal spot, segment 9 is blue. Segment 10 is black on dorsum and blue on the sides. Female is similar to the male except in the last three abdominal segments. Segment 8 has a broad black mark on dorsum, 9 with a small basal dorsal spot, and 10 is entirely blue.
It flies close to the ground and found in shrub dominated wetlands. In spite of its delicate build, it enjoys migration by rising high in the air and takes advantage of its lightweight in air currents. List of odonates of India
List of odonata of Kerala Data related to Aciagrion occidentale at Wikispecies Media related to Aciagrion occidentale at Wikimedia Commons Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Green-Striped Slender Dartlet sighting in Chennai on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 338th most-seen of the 376 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
August and September
In those months about 10% of wildlife watchers report a Green-Striped Slender Dartlet in Chennai on a given day, against under 5% in October to July, the lowest months.
4th of 4
Of the 4 cities where we can rate Green-Striped Slender Dartlet sightings, Chennai ranks 4th at under 5%. The best odds are in Thrissur (India, about 10%), Kollam (India, about 10%) and Kochi (India, about 10%).
Same family: Coenagrionidae
The closest relatives of the Green-Striped Slender Dartlet that you can see in Chennai (family Coenagrionidae, Narrow-winged Damselflies) are Wandering Midget (about 30%), Coromandel Marsh Dart (about 30%) and Common Bluetail (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Green-Striped Slender Dartlet is recorded against all the insects logged in Chennai (6 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.
