Rosalia funebris
In 3 days ~30% 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 Great Bear Rainforest on a given day, based on 26 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 39th most-seen of the 235 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Banded Alder Borer in Great Bear Rainforest on a given day, against under 5% in October to June, the lowest months. That is one of Great Bear Rainforest's driest months, with about 120 mm of rain against 480 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.
Yes
Of the 2 parks where we can rate Banded Alder Borer sightings, Great Bear Rainforest has the highest daily chance: about 10%. Next come Olympic National Park (United States, about 10%).
Same family: Cerambycidae
The closest relatives of the Banded Alder Borer that you can see in Great Bear Rainforest (family Cerambycidae, Longhorn Beetles) are Etorofus obliteratus (about 10%), Thorn-Tailed Longhorn Beetle (about 10%) and White-Spotted Sawyer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Banded Alder Borer is recorded against all the insects logged in Great Bear Rainforest (26 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.
