Pieris marginalis
In 3 days ~40% in a week ~70%
Pieris marginalis (margined white) is a butterfly species seen across the coast of Western North America. It is a canopy generalist who feeds on the plant family of Brassiceae. The species is unique as it has been seen near and away from disturbed habitat; indicating an adaptation for habitat generalization. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Redwood National Park | 🇺🇸 United States | |
| 2 | Olympic National Park | 🇺🇸 United States | |
| 3 | Glacier National Park | 🇺🇸 United States | |
| 4 | Rocky Mountain National Park | 🇺🇸 United States | |
| 5 | Grand Teton National Park | 🇺🇸 United States | |
| 6 | Zion National Park | 🇺🇸 United States | |
| 7 | Yellowstone National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vancouver | 🇨🇦 Canada | |
| 2 | Anchorage | 🇺🇸 United States | |
| 3 | Seattle | 🇺🇸 United States | |
| 4 | Portland | 🇺🇸 United States | |
| 5 | San Francisco | 🇺🇸 United States |
Possible
About 20% of wildlife watchers report a Margined White sighting in Olympic National Park on a given day, based on 92 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 6th most-seen of the 207 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
April–May and July
In those months about 20% of wildlife watchers report a Margined White in Olympic National Park on a given day, against under 5% in October to February, the lowest months. Those are among Olympic National Park's driest months, with about 100 mm of rain a month against 370 mm in November.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Margined White sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 7 parks where we can rate Margined White sightings, Olympic National Park ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Redwood National Park (United States, about 20%).
GBIF citizen-science records
It is estimated from how often the Margined White is recorded against all the insects logged in Olympic National Park (92 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.
