Rosalia funebris
In 3 days ~20% in a week ~50%
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 |
With luck
About 10% of wildlife watchers report a Banded Alder Borer sighting in Seattle on a given day, based on 145 verified sightings from GBIF citizen-science data. It is the 36th most-seen of the 428 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
July and August
In those months about 20% of wildlife watchers report a Banded Alder Borer in Seattle on a given day, against under 5% in October to June, the lowest months. Those are among Seattle's driest months, with about 25 mm of rain a month against 190 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.
Among the best
Of the 5 cities where we can rate Banded Alder Borer sightings, Seattle ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Portland (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 Seattle (145 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.
