Xylotrechus colonus
In 3 days ~10% in a week ~20%
Xylotrechus colonus is a species of beetle in the family Cerambycidae, subfamily Cerambycinae, and tribe Clytini. Its common name is rustic borer or rustic borer beetle. It was described by Johan Christian Fabricius in 1775. The larvae of this beetle feed on the sapwood of oaks (Quercus), whereas adults feed on the nectar of goldenrod (Solidago) and other composite flowers. The wing covers are black, with variable bands of grey, and a sinuous yellow mark near the base. The underside of the beetle is black, with faint yellow banding. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Baltimore | 🇺🇸 United States | |
| 2 | Houston | 🇺🇸 United States | |
| 3 | Dallas | 🇺🇸 United States | |
| 4 | Washington | 🇺🇸 United States | |
| 5 | Philadelphia | 🇺🇸 United States | |
| 6 | Toronto | 🇨🇦 Canada | |
| 7 | New York City | 🇺🇸 United States | |
| 8 | Boston | 🇺🇸 United States | |
| 9 | Chicago | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Rustic Borer sighting in Great Smoky Mountains National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 628th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Rustic Borer in Great Smoky Mountains National Park on a given day, against under 5% in August to May, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Rustic Borer sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Great Smoky Mountains National Park, in our data
Great Smoky Mountains National Park is the only park on Wallace's Line with enough records to rate Rustic Borer sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Cerambycidae
The closest relatives of the Rustic Borer that you can see in Great Smoky Mountains National Park (family Cerambycidae, Longhorn Beetles) are Broad-Necked Root Borer (about 20%), Strangalepta Flower Longhorn Beetle (about 10%) and Eastern Elderberry Borer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rustic Borer is recorded against all the insects logged in Great Smoky Mountains National 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.
