Eupatorus gracilicornis
In 3 days ~20% in a week ~50%
Eupatorus gracilicornis, the five-horned rhinoceros beetle (Thai: ด้วงกว่างซางเหนือ (DâwŋGwā̀ŋŞāŋĦeNǖx)) is a beetle that has four large horns on the prothorax and one extra-long cephalic horn. Rhinoceros beetles, the Dynastinae, are a subfamily of the scarab beetle family (Scarabaeidae).
The five-horned rhinoceros beetle has been found in China, India, Myanmar, Thailand, Cambodia, Malaysia, Laos and Vietnam. Its coloring is shiny jet-black, while the elytra or fore wings are colored yellow or gold. The body is covered by a thick exoskeleton and a pair of thick wing covers lay atop another set of membranous wings underneath, allowing the beetle to fly, although not very efficiently, owing to its large size.
The flying season is usually in September, when most of the males usually appear to wait for copulation. Its length is 50–95 mm. As a larva, its diet is rotten wood. Its adult diet consists of nectar, plant sap and fruit. It was first described by the British entomologist Gilbert John Arrow in 1908. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Doi Inthanon National Park | 🇹🇭 Thailand |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Five-Horned Rhinoceros Beetle sighting in Doi Inthanon National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 131st most-seen of the 153 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
October
In that month about 30% of wildlife watchers report a Five-Horned Rhinoceros Beetle in Doi Inthanon National Park on a given day, against under 5% in November to August, the lowest months.
Between 1 and 4 am
Across all the parks we cover, that three-hour window holds the most Five-Horned Rhinoceros Beetle sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Doi Inthanon National Park, in our data
Doi Inthanon National Park is the only park on Wallace's Line with enough records to rate Five-Horned Rhinoceros Beetle sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Coleoptera
The closest relatives of the Five-Horned Rhinoceros Beetle that you can see in Doi Inthanon National Park (order Coleoptera, Beetles) are Enoplotrupes sharpi (about 30%) and Golden-Spotted Tiger Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Five-Horned Rhinoceros Beetle is recorded against all the insects logged in Doi Inthanon National Park (7 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.
