Judolia instabilis
In 3 days ~40% in a week ~60%
Judolia instabilis is a species of beetle in the family Cerambycidae. It was described by Haldeman in 1847. Their appearance ranges from black with yellow spots to full black in color. They range in size from 6 mm to 15 mm in length. They inhabit the U.S and Canada. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 2 | Yosemite National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Judolia instabilis sighting in Sequoia and Kings Canyon National Parks on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 33rd most-seen of the 161 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
July and August
In those months about 20% of wildlife watchers report a Judolia instabilis in Sequoia and Kings Canyon National Parks on a given day, against under 5% in October to May, the lowest months. Those are among Sequoia and Kings Canyon National Parks's driest months, with about 25 mm of rain a month against 190 mm in January.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Judolia instabilis sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Judolia instabilis sightings, Sequoia and Kings Canyon National Parks has the highest daily chance: about 10%. Next come Yosemite National Park (United States, about 10%).
Same family: Cerambycidae
The closest relatives of the Judolia instabilis that you can see in Sequoia and Kings Canyon National Parks (family Cerambycidae, Longhorn Beetles) are White-Spotted Sawyer (about 40%), California Root Borer (about 10%) and Dimorphic Flower Longhorn Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Judolia instabilis is recorded against all the insects logged in Sequoia and Kings Canyon National Parks (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.
