Orthetrum triangulare
In 3 days ~80% in a week >90%
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 |
Likely
About 40% of wildlife watchers report a Blue-Tailed Forest Hawk sighting in Namdapha National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 22nd most-seen of the 71 insects we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
May and October
In those months about 60% of wildlife watchers report a Blue-Tailed Forest Hawk in Namdapha National Park on a given day, against about 10% in January to March, the lowest months. June to August have too few records to rate.
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.
Yes
Of the 5 parks where we can rate Blue-Tailed Forest Hawk sightings, Namdapha National Park has the highest daily chance: about 40%. Next come 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 Namdapha National Park (genus Orthetrum) are Blue Marsh Hawk (about 30%) and Crimson-Tailed Marsh Hawk (about 30%), 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 Namdapha National Park (12 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.
