Centrodera spurca
In 3 days ~10% in a week ~20%
Centrodera spurca, the yellow Douglas fir borer, is a species of flower longhorn in the beetle family Cerambycidae. It is found in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States | |
| 2 | San Francisco | 🇺🇸 United States | |
| 3 | San Diego | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Yellow Douglas-Fir Borer sighting in Portland on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 296th most-seen of the 507 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
In that month about 10% of wildlife watchers report a Yellow Douglas-Fir Borer in Portland on a given day, against under 5% in July to May, the lowest months. That is one of Portland's driest months, with about 55 mm of rain against 250 mm in December.
Yes
Of the 3 cities where we can rate Yellow Douglas-Fir Borer sightings, Portland has the highest daily chance: under 5%. Next come San Francisco (United States, under 5%) and San Diego (United States, under 5%).
Same family: Cerambycidae
The closest relatives of the Yellow Douglas-Fir Borer that you can see in Portland (family Cerambycidae, Longhorn Beetles) are Banded Alder Borer (about 10%), Xestoleptura crassipes (about 10%) and Locust Borer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow Douglas-Fir Borer is recorded against all the insects logged in Portland (13 verified sightings), 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.
