Purpuricenus humeralis
In 3 days ~10% in a week ~30%
Purpuricenus humeralis is a species of beetle in the family Cerambycidae. It was described by Fabricus in 1798.The common name of this species is Red Triangle Longhorn beetle, owing to the distinctive red triangles on its elytron (wing case). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Red Triangle Long-Horned Beetle sighting in Shenandoah National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 447th most-seen of the 723 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Red Triangle Long-Horned Beetle in Shenandoah National Park on a given day, against under 5% in August to May, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Red Triangle Long-Horned Beetle sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Shenandoah National Park, in our data
Shenandoah National Park is the only park on Wallace's Line with enough records to rate Red Triangle Long-Horned Beetle sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Cerambycidae
The closest relatives of the Red Triangle Long-Horned Beetle that you can see in Shenandoah National Park (family Cerambycidae, Longhorn Beetles) are Locust Borer (about 20%), Red Milkweed Beetle (about 20%) and Strangalepta Flower Longhorn Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Red Triangle Long-Horned Beetle is recorded against all the insects logged in Shenandoah 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.
