Xylotrupes gideon
In 3 days ~20% in a week ~50%
Xylotrupes gideon, the brown rhinoceros beetle, is a species of large scarab beetle belonging to the subfamily Dynastinae. Seven subspecies have been identified. Xylotrupes gideon australicus Xylotrupes gideon borneensis Minck, 1920
This species is widespread in India, Sri Lanka, Thailand, Indonesia: Java (nominotypical form), Borneo (borneensis), Sunda Islands and Moluccas. Xylotrupes gideon can reach a length of 3.5–7 centimetres (1.4–2.8 in). As usual with rhinoceros beetles there is a great difference between the genders. Males are larger than females. They have two chitinous bifurcated horns, a thick thoracic horn and a smaller cephalic horn, which they use to eliminate their rivals during the mating period. These beetles are shiny dark red, dark brown, or black in coloration. The eyes are located on each side of the head. When disturbed these beetles make a hissing noise, produced by... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kinabalu Park | 🇲🇾 Malaysia |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jakarta | 🇮🇩 Indonesia | |
| 2 | Bandung | 🇮🇩 Indonesia | |
| 3 | Malang | 🇮🇩 Indonesia | |
| 4 | Tasikmalaya | 🇮🇩 Indonesia | |
| 5 | Yogyakarta | 🇮🇩 Indonesia | |
| 6 | Denpasar | 🇮🇩 Indonesia |
With luck
About 10% of wildlife watchers report a Siamese Rhinoceros Beetle sighting in Kinabalu Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 246th most-seen of the 297 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.
May and August
In those months about 20% of wildlife watchers report a Siamese Rhinoceros Beetle in Kinabalu Park on a given day, against under 5% in June–July and September–March, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Siamese Rhinoceros Beetle sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Kinabalu Park, in our data
Kinabalu Park is the only park on Wallace's Line with enough records to rate Siamese Rhinoceros Beetle sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Siamese Rhinoceros Beetle is recorded against all the insects logged in Kinabalu Park (5 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.
