Lucanus mazama
In 3 days ~30% in a week ~50%
Lucanus mazama is a beetle of the family Lucanidae. Its common name is the cottonwood stag beetle. It is considered "scaraboid" but is not necessarily confined to deserts. They are often found in the wood chip ground covering at playgrounds. It is located primarily in the western and southwestern United States. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Zion National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Salt Lake City | 🇺🇸 United States | |
| 2 | Denver | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Cottonwood Stag Beetle sighting in Zion National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 48th most-seen of the 114 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 30% of wildlife watchers report a Cottonwood Stag Beetle in Zion National Park on a given day, against under 5% in September to May, the lowest months. That is one of Zion National Park's driest months, with about 20 mm of rain against 75 mm in March.
Between 5 and 8 am
Across all the parks we cover, that three-hour window holds the most Cottonwood Stag Beetle sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Only Zion National Park, in our data
Zion National Park is the only park on Wallace's Line with enough records to rate Cottonwood Stag Beetle sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Coleoptera
The closest relatives of the Cottonwood Stag Beetle that you can see in Zion National Park (order Coleoptera, Beetles) are Obscure Darkling Beetle (about 50%), Western Rhinoceros Beetle (about 40%) and Oblique-Lined Tiger Beetle (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cottonwood Stag Beetle is recorded against all the insects logged in Zion National Park (10 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.
