Orthetrum triangulare
In 3 days ~30% in a week ~60%
Orthetrum triangulare is an Asian freshwater dragonfly species. The common name for this species is blue-tailed forest hawk. Two subspecies of Orthetrum triangulare are currently recognised, the nominate subspecies and O. t. malaccense.
It is a medium-sized dragonfly with dark face and bluish eyes. Its thorax is also black with a broad apple green stripe on both sides. Segments 1-2 and 8–10 in the abdomen are black and the remaining segments are pruinosed with azure blue. It is usually found in marshes associated with hill streams where it breeds.
List of odonates of Sri Lanka List of odonates of India List of odonata of Kerala Media related to Orthetrum triangulare at Wikimedia Commons Data related to Orthetrum triangulare at Wikispecies Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Namdapha National Park | 🇮🇳 India | |
| 2 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 3 | Taroko National Park | 🇹🇼 Taiwan | |
| 4 | Khao Yai National Park | 🇹🇭 Thailand | |
| 5 | Kaeng Krachan National Park | 🇹🇭 Thailand |
With luck
About 10% of wildlife watchers report a Blue-Tailed Forest Hawk sighting in Khao Yai National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 73rd most-seen of the 221 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.
March–July and September–October
In those months about 20% of wildlife watchers report a Blue-Tailed Forest Hawk in Khao Yai National Park on a given day, against under 5% in February, August and November–December, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Blue-Tailed Forest Hawk sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 parks where we can rate Blue-Tailed Forest Hawk sightings, Khao Yai National Park ranks 4th at about 10%. The best odds are in Namdapha National Park (India, about 40%), Doi Inthanon National Park (Thailand, about 30%) and Taroko National Park (Taiwan, about 20%).
Same genus: Orthetrum
The closest relatives of the Blue-Tailed Forest Hawk that you can see in Khao Yai National Park (genus Orthetrum) are Brown-Backed Red Marsh Hawk (about 20%), Crimson-Tailed Marsh Hawk (about 20%) and Blue Marsh Hawk (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Blue-Tailed Forest Hawk is recorded against all the insects logged in Khao Yai National Park (11 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.
