Osmia bucephala
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Bufflehead Mason Bee sighting in Boston on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 565th most-seen of the 1200 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
May and June
In those months about 10% of wildlife watchers report a Bufflehead Mason Bee in Boston on a given day, against under 5% in July to April, 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.
Only Boston, in our data
Boston is the only city on Wallace's Line with enough records to rate Bufflehead Mason Bee sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Bufflehead Mason Bee is recorded against all the insects logged in Boston (16 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.
