Trithemis festiva
In 3 days ~40% in a week ~70%
The black stream glider (Trithemis festiva), also known as the indigo dropwing is a species of dragonfly in the family Libellulidae. It is a very widespread species, occurring from Greece, Cyprus and Turkey, throughout Asia to New Guinea.
Black stream glider is a medium-sized dragonfly with purple color on its body structure. In the male, the frontal area appears darker purplish grey. The eyes are dark brown above, with a purple colored tinge, which is bluish grey, lateral and beneath. The thorax is black, covered with purple pruinescence, which helps it appear deep blue. The legs are black and wings are transparent with a dark opaque brown mark at the base of hind wing, with a black spot on tip of the wing. The abdomen is covered with fine blue pruinescence.
The female looks brown in the front and extends above. The eyes are dark brown above and appear more grey-ish below. Thorax is greenish-yellow to olivaceous, with the presence of a medial dark brown lateral stripe. In addition, a Y-shaped inverted stripes can be observed on the sides. Legs are black with anterior femora being yellow on the inner side. Wings are transparent with dark reddish-brown tip with a black... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka | |
| 2 | Periyar National Park | 🇮🇳 India | |
| 3 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 4 | Satpura National Park | 🇮🇳 India | |
| 5 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 6 | Kinabalu Park | 🇲🇾 Malaysia | |
| 7 | Bali Barat National Park | 🇮🇩 Indonesia | |
| 8 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 9 | Kanha National Park | 🇮🇳 India | |
| 10 | Khao Sok National Park | 🇹🇭 Thailand | |
| 11 | Khao Yai National Park | 🇹🇭 Thailand | |
| 12 | Kaeng Krachan National Park | 🇹🇭 Thailand |
Possible
About 20% of wildlife watchers report an Indigo Dropwing sighting in Khao Sok National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 36th most-seen of the 104 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
December
In that month about 40% of wildlife watchers report an Indigo Dropwing in Khao Sok National Park on a given day, against under 5% in February–March and May–November, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Indigo Dropwing sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
10th of 12
Of the 12 parks where we can rate Indigo Dropwing sightings, Khao Sok National Park ranks 10th at about 20%. The best odds are in Sinharaja Forest Reserve (Sri Lanka, about 30%), Periyar National Park (India, about 20%) and Danum Valley Conservation Area (Malaysia, about 20%).
GBIF citizen-science records
It is estimated from how often the Indigo Dropwing is recorded against all the insects logged in Khao Sok National Park (15 verified sightings from 2019 to 2026), 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.
