Chlosyne palla
In 3 days ~30% in a week ~50%
Chlosyne palla, the northern checkerspot, is a butterfly of the family Nymphalidae that is found in North America. They range from southern British Columbia to Alberta, south to California, Utah, and Colorado, excluding Nevada. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 2 | Rocky Mountain National Park | 🇺🇸 United States | |
| 3 | Yosemite National Park | 🇺🇸 United States | |
| 4 | Glacier National Park | 🇺🇸 United States | |
| 5 | Grand Teton National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Francisco | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Northern Checkerspot sighting in Yosemite National Park on a given day, based on 35 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 57th most-seen of the 227 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
May and July
In those months about 20% of wildlife watchers report a Northern Checkerspot in Yosemite National Park on a given day, against under 5% in August to April, the lowest months. Those are among Yosemite National Park's driest months, with about 40 mm of rain a month against 220 mm in January.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Northern Checkerspot 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 5 parks where we can rate Northern Checkerspot sightings, Yosemite National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Sequoia and Kings Canyon National Parks (United States, about 10%) and Rocky Mountain National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Northern Checkerspot is recorded against all the insects logged in Yosemite National Park (35 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.
