Urocerus californicus
In 3 days ~10% in a week ~30%
| # | 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 | Seattle | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a California Horntail sighting in Yosemite National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 192nd most-seen of the 227 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.
June and October
In those months about 10% of wildlife watchers report a California Horntail in Yosemite National Park on a given day, against under 5% in July–September and November–May, the lowest months. Those are among Yosemite National Park's driest months, with about 35 mm of rain a month against 220 mm in January.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most California Horntail sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
2nd of 2
Of the 2 parks where we can rate California Horntail sightings, Yosemite National Park ranks 2nd at under 5%. The best odds are in Sequoia and Kings Canyon National Parks (United States, about 10%).
Same order: Hymenoptera
The closest relatives of the California Horntail that you can see in Yosemite National Park (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Yellow-Faced Bumble Bee (about 20%), Western Black Carpenter Ant (about 10%) and Western Carpenter Bee (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the California Horntail is recorded against all the insects logged in Yosemite 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.
