Speyeria hydaspe
In 3 days ~20% in a week ~30%
Speyeria hydaspe, the Hydaspe fritillary, is a species of orange-brown butterfly found in the western portions of the United States and Canada. A small fritillary, it usually has cream-colored underwing spots, but the Vancouver Island subspecies has silver spots. It is similar to S. zerene and S. atlantis, but may be distinguished by the smooth and even appearance of its postmedian spotband.
The caterpillars feed on violets including Viola glabella. A single brood flies from July through September and feeds on flower nectar. They may be found in moist forests, in clearings and subalpine meadows. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Olympic National Park | 🇺🇸 United States | |
| 2 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 3 | Glacier National Park | 🇺🇸 United States | |
| 4 | Yosemite National Park | 🇺🇸 United States | |
| 5 | Banff National Park | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Hydaspe Fritillary sighting in Yosemite National Park on a given day, based on 17 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 116th 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 30%, if each day is a fresh chance.
June to August
In those months about 10% of wildlife watchers report a Hydaspe Fritillary in Yosemite National Park on a given day, against under 5% in September to May, the lowest months. Those are among Yosemite National Park's driest months, with about 25 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 Hydaspe Fritillary sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 parks where we can rate Hydaspe Fritillary sightings, Yosemite National Park ranks 4th at about 10%. The best odds are in Olympic National Park (United States, about 20%), Sequoia and Kings Canyon National Parks (United States, about 10%) and Glacier National Park (United States, about 10%).
Same genus: Speyeria
The closest relatives of the Hydaspe Fritillary that you can see in Yosemite National Park (genus Speyeria) are Mormon Fritillary (about 20%), Great Basin Fritillary (about 10%) and Great Spangled Fritillary (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hydaspe Fritillary is recorded against all the insects logged in Yosemite National Park (17 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.
