Rosalia funebris
In 3 days ~10% in a week ~30%
The Banded Alder Borer (Rosalia funebris) is a member of the very diverse family of longhorn beetles. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Bear Rainforest | 🇨🇦 Canada | |
| 2 | Olympic National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States | |
| 2 | Seattle | 🇺🇸 United States | |
| 3 | Vancouver | 🇨🇦 Canada | |
| 4 | Los Angeles | 🇺🇸 United States | |
| 5 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Banded Alder Borer sighting in Vancouver on a given day, based on 39 verified sightings from GBIF citizen-science data. It is the 143rd most-seen of the 482 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.
July and August
In those months about 10% of wildlife watchers report a Banded Alder Borer in Vancouver on a given day, against under 5% in September to June, the lowest months. Those are among Vancouver's driest months, with about 30 mm of rain a month against 210 mm in November.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Banded Alder Borer sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 5
Of the 5 cities where we can rate Banded Alder Borer sightings, Vancouver ranks 3rd at under 5%. The best odds are in Portland (United States, about 10%) and Seattle (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Banded Alder Borer is recorded against all the insects logged in Vancouver (39 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.
