Orthetrum triangulare
In 3 days ~60% 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 |
Possible
About 30% of wildlife watchers report a Blue-Tailed Forest Hawk sighting in Dehradun on a given day, based on 23 verified sightings from GBIF citizen-science data. It is the 7th most-seen of the 73 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
July to September
In those months about 40% of wildlife watchers report a Blue-Tailed Forest Hawk in Dehradun on a given day, against under 5% in October to March, the lowest months. Those are among Dehradun's wettest months, with about 300 mm of rain a month against 5 mm in November.
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 8 cities where we can rate Blue-Tailed Forest Hawk sightings, Dehradun has the highest daily chance: about 30%. Next come Taipei (Taiwan, about 20%) and Nanjing (China, about 10%).
Same genus: Orthetrum
The closest relatives of the Blue-Tailed Forest Hawk that you can see in Dehradun (genus Orthetrum) are Blue Marsh Hawk (about 20%) and Crimson-Tailed 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 Dehradun (23 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.
