Megachile policaris
In 3 days ~10% in a week ~20%
Megachile policaris is a species of bee in the family Megachilidae. It was described by Thomas Say in 1831. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Antonio | 🇺🇸 United States | |
| 2 | Austin | 🇺🇸 United States | |
| 3 | Dallas | 🇺🇸 United States | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | San Diego | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Megachile policaris sighting in Saguaro National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 300th most-seen of the 354 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.
September to November
In those months about 10% of wildlife watchers report a Megachile policaris in Saguaro National Park on a given day, against under 5% in December to August, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Megachile policaris sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Saguaro National Park, in our data
Saguaro National Park is the only park on Wallace's Line with enough records to rate Megachile policaris sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Hymenoptera
The closest relatives of the Megachile policaris that you can see in Saguaro National Park (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Arizona Paper Wasp (about 20%), Yellow Paper Wasp (about 10%) and Desert Leaf-Cutter Ant (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Megachile policaris is recorded against all the insects logged in Saguaro National Park (5 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.
