Polyphylla sobrina
In 3 days ~20% in a week ~40%
Polyphylla sobrina is a species of scarab beetle in the family Scarabaeidae. It is found in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yosemite National Park | 🇺🇸 United States |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Polyphylla sobrina sighting in Yosemite National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 75th most-seen of the 227 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Polyphylla sobrina in Yosemite National Park on a given day, against under 5% in August to May, the lowest months. That is one of Yosemite National Park's driest months, with about 25 mm of rain against 220 mm in January.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Polyphylla sobrina sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Yosemite National Park, in our data
Yosemite National Park is the only park on Wallace's Line with enough records to rate Polyphylla sobrina sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Polyphylla sobrina is recorded against all the insects logged in Yosemite National Park (20 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.
