Megachile sculpturalis
In 3 days ~10% in a week ~30%
Megachile sculpturalis, known as the giant resin bee and sculptured resin bee, is a species of leafcutting bees belonging to the family Megachilidae. Native to Japan and China, it has been introduced to the Eastern United States and Ontario, Canada in recent times. First established in the United States during the early 1990s, records currently exist from most states east of the Mississippi River. In Europe, it was first observed close to Marseille's (France) port in 2008. Since then, this invasive species has also been recorded in the following European countries: Bosnia & Herzegovina, Germany, Hungary, Italy, Serbia, Slovenia, Spain, and Switzerland.
Megachile sculpturalis can reach a body length of about 19–22 mm (0.75–0.87 in) in males, while females usually are larger than males, reaching about 21–25 mm (0.83–0.98 in). It is much bigger than most other leafcutting bees. The body is cylindrical, jaws are large and wings are transparent, with a brown color that darkens toward the tips. Head and abdomen are mainly black, the abdomen is rather shiny and without hairs, while thorax is covered with dense yellowish-brown pubescence. In males the abdomen... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Shenandoah National Park | 🇺🇸 United States | |
| 3 | Point Pelee National Park | 🇨🇦 Canada | |
| 4 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 5 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Budapest | 🇭🇺 Hungary | |
| 2 | Barcelona | 🇪🇸 Spain | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Philadelphia | 🇺🇸 United States | |
| 5 | Bucharest | 🇷🇴 Romania | |
| 6 | New York City | 🇺🇸 United States | |
| 7 | Milan | 🇮🇹 Italy | |
| 8 | Lyon | 🇫🇷 France | |
| 9 | Vienna | 🇦🇹 Austria | |
| 10 | Baltimore | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Sculptured Resin Bee sighting in Pyrénées National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 576th most-seen of the 1277 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.
July to September
In those months about 10% of wildlife watchers report a Sculptured Resin Bee in Pyrénées National Park on a given day, against under 5% in October to June, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Sculptured Resin Bee sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 5 parks where we can rate Sculptured Resin Bee sightings, Pyrénées National Park ranks 5th at about 10%, level with the leaders once rounded. The best odds are in Cévennes National Park (France, about 10%), Shenandoah National Park (United States, about 10%) and Point Pelee National Park (Canada, about 10%).
GBIF citizen-science records
It is estimated from how often the Sculptured Resin Bee is recorded against all the insects logged in Pyrénées National Park (14 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.
