Nymphalis californica
In 3 days ~60% in a week ~90%
The California tortoiseshell (Nymphalis californica) is a butterfly of the family Nymphalidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Glacier National Park | 🇺🇸 United States | |
| 2 | Yosemite National Park | 🇺🇸 United States | |
| 3 | Grand Teton National Park | 🇺🇸 United States | |
| 4 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 5 | Redwood National Park | 🇺🇸 United States | |
| 6 | Yellowstone National Park | 🇺🇸 United States | |
| 7 | Zion National Park | 🇺🇸 United States | |
| 8 | Olympic National Park | 🇺🇸 United States | |
| 9 | Pacific Rim National Park Reserve | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Salt Lake City | 🇺🇸 United States | |
| 2 | Portland | 🇺🇸 United States | |
| 3 | San Francisco | 🇺🇸 United States | |
| 4 | Sacramento | 🇺🇸 United States | |
| 5 | Vancouver | 🇨🇦 Canada | |
| 6 | Seattle | 🇺🇸 United States | |
| 7 | Los Angeles | 🇺🇸 United States | |
| 8 | Toronto | 🇨🇦 Canada |
Possible
About 30% of wildlife watchers report a California Tortoiseshell sighting in Yosemite National Park on a given day, based on 146 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 227 insects we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
February and March
In those months about 40% of wildlife watchers report a California Tortoiseshell in Yosemite National Park on a given day, against under 5% in December, the lowest month. Those are among Yosemite National Park's wettest months, with about 180 mm of rain a month against 25 mm in September.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most California Tortoiseshell sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 9 parks where we can rate California Tortoiseshell sightings, Yosemite National Park ranks 2nd at about 30%, level with the leaders once rounded. The best odds are in Glacier National Park (United States, about 30%).
GBIF citizen-science records
It is estimated from how often the California Tortoiseshell is recorded against all the insects logged in Yosemite National Park (146 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.
