Trithemis festiva
In 3 days ~30% in a week ~60%
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 |
With luck
About 10% of wildlife watchers report an Indigo Dropwing sighting in Singapore on a given day, based on 385 verified sightings from GBIF citizen-science data. It is the 98th most-seen of the 1045 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
Any time of year
In every month with enough records, about 10% of wildlife watchers report an Indigo Dropwing in Singapore on a given day, so our monthly data shows no clear season.
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.
8th of 12
Of the 12 cities where we can rate Indigo Dropwing sightings, Singapore ranks 8th at about 10%. The best odds are in Kota (India, about 20%), Nagpur (India, about 20%) and Antalya (Turkey, about 20%).
Same genus: Trithemis
The closest relatives of the Indigo Dropwing that you can see in Singapore (genus Trithemis, Dropwings) are Crimson Marsh Glider (about 30%) and Dancing Dropwing (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Indigo Dropwing is recorded against all the insects logged in Singapore (385 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.
