Orthetrum glaucum
In 3 days ~60% in a week ~90%
Orthetrum glaucum is an Asian dragonfly species, common across much of tropical and subtropical Asia. The common name for this species is blue marsh hawk. It is a medium sized dragonfly with dark face and greenish blue eyes. The thorax of old males are dark blue due to pruinescence. Its wings are transparent with dark amber-yellow tint in the extreme base. Its abdomen is pruinosed with blue color up to segment 8; last two segments are black. The abdomens of females and juvenile males are golden in color, with brown stripes along the sides of the thorax. Despite their visual similarities, females and juvenile males can be distinguished by the shape of their final abdomen segment.
It breeds in marshes associated with forest streams, plantations and canals. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Periyar National Park | 🇮🇳 India | |
| 2 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 3 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 4 | Namdapha National Park | 🇮🇳 India | |
| 5 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 6 | Kinabalu Park | 🇲🇾 Malaysia | |
| 7 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka | |
| 8 | Khao Luang National Park | 🇹🇭 Thailand | |
| 9 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 10 | Khao Yai National Park | 🇹🇭 Thailand | |
| 11 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 12 | Khao Sok National Park | 🇹🇭 Thailand | |
| 13 | Taroko National Park | 🇹🇼 Taiwan | |
| 14 | Taman Negara National Park | 🇲🇾 Malaysia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hong Kong | 🇨🇳 China | |
| 2 | Dehradun | 🇮🇳 India | |
| 3 | Singapore | 🇸🇬 Singapore | |
| 4 | Tuen Mun | 🇨🇳 China | |
| 5 | Kuala Lumpur | 🇲🇾 Malaysia | |
| 6 | Taichung | 🇹🇼 Taiwan | |
| 7 | Taipei | 🇹🇼 Taiwan | |
| 8 | Xiamen City | 🇨🇳 China | |
| 9 | Guangzhou | 🇨🇳 China | |
| 10 | Bandung | 🇮🇩 Indonesia |
Possible
About 30% of wildlife watchers report a Blue Marsh Hawk sighting in Hong Kong on a given day, based on 537 verified sightings from GBIF citizen-science data. It is the 9th most-seen of the 1125 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.
August to October
In those months about 40% of wildlife watchers report a Blue Marsh Hawk in Hong Kong on a given day, against about 10% in December to March, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Blue Marsh Hawk sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 15 cities where we can rate Blue Marsh Hawk sightings, Hong Kong has the highest daily chance: about 30%. Next come Dehradun (India, about 20%) and Singapore (Singapore, about 20%).
Same genus: Orthetrum
The closest relatives of the Blue Marsh Hawk that you can see in Hong Kong (genus Orthetrum) are Crimson-Tailed Marsh Hawk (about 20%), Brown-Backed Red Marsh Hawk (about 10%) and Blue-Tailed Forest Hawk (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Blue Marsh Hawk is recorded against all the insects logged in Hong Kong (537 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.
