Osmoderma scabra
In 3 days ~20% in a week ~30%
Osmoderma scabrum, or the rough hermit beetle, is a species in the family Scarabaeidae ("scarab beetles"), in the order Coleoptera ("beetles"). Occurring in eastern North America from Quebec south to Tennessee, it is 14-20 mm long and black, sometimes with a metallic sheen. Adults are nocturnally active and may be found at sap flows or under bark. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 3 | Shenandoah National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Rough Hermit Beetle sighting in Montreal on a given day, based on 86 verified sightings from GBIF citizen-science data. It is the 128th most-seen of the 926 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
June to August
In those months about 10% of wildlife watchers report a Rough Hermit Beetle in Montreal on a given day, against under 5% in September to May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Rough Hermit Beetle sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 cities where we can rate Rough Hermit Beetle sightings, Montreal has the highest daily chance: about 10%. Next come Toronto (Canada, about 10%).
GBIF citizen-science records
It is estimated from how often the Rough Hermit Beetle is recorded against all the insects logged in Montreal (86 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.
