Speyeria hydaspe
In 3 days ~20% in a week ~40%
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 Glacier National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 73rd most-seen of the 147 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
July and August
In those months about 10% of wildlife watchers report a Hydaspe Fritillary in Glacier National Park on a given day, against under 5% in September to June, the lowest months. Those are among Glacier National Park's driest months, with about 30 mm of rain a month against 80 mm in February.
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.
3rd of 5
Of the 5 parks where we can rate Hydaspe Fritillary sightings, Glacier National Park ranks 3rd at about 10%. The best odds are in Olympic National Park (United States, about 20%) and Sequoia and Kings Canyon National Parks (United States, about 10%).
Same genus: Speyeria
The closest relatives of the Hydaspe Fritillary that you can see in Glacier National Park (genus Speyeria) are Mormon Fritillary (about 10%), Atlantis Fritillary (about 10%) and Zerene 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 Glacier National Park (12 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.
