Osmia bucephala
In 3 days ~10% in a week ~30%
Osmia bucephala, the bufflehead mason bee, is a species of bee in the family Megachilidae. It is found in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Bufflehead Mason Bee sighting in Great Smoky Mountains National Park on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 379th most-seen of the 822 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.
March to May
In those months about 10% of wildlife watchers report a Bufflehead Mason Bee in Great Smoky Mountains National Park on a given day, against under 5% in June to February, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Bufflehead Mason Bee 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 2 parks where we can rate Bufflehead Mason Bee sightings, Great Smoky Mountains National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Shenandoah National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Bufflehead Mason Bee is recorded against all the insects logged in Great Smoky Mountains National Park (13 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.
