Xyloryctes thestalus
In 3 days ~80% in a week >90%
Xyloryctes thestalus is a species of rhinoceros beetle in the family Scarabaeidae. These two subspecies belong to the species Xyloryctes thestalus: Xyloryctes thestalus borealis Endrödi, 1975 Xyloryctes thestalus thestalus Bates, 1888 Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Zion National Park | 🇺🇸 United States | |
| 2 | Saguaro National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Puebla | 🇲🇽 México | |
| 2 | Mexico City | 🇲🇽 México |
Likely
About 40% of wildlife watchers report a Western Rhinoceros Beetle sighting in Zion National Park on a given day, based on 108 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 5th most-seen of the 114 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.
August and September
In those months about 60% of wildlife watchers report a Western Rhinoceros Beetle in Zion National Park on a given day, against under 5% in December to April, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Western 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.
Yes
Of the 2 parks where we can rate Western Rhinoceros Beetle sightings, Zion National Park has the highest daily chance: about 40%. Next come Saguaro National Park (United States, under 5%).
Same family: Scarabaeidae
The closest relatives of the Western Rhinoceros Beetle that you can see in Zion National Park (family Scarabaeidae, Scarabs) are Grant's Hercules Beetle (about 10%), Figeater Beetle (about 10%) and Ten-Lined June Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Western Rhinoceros Beetle is recorded against all the insects logged in Zion National Park (108 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.
