Pieris marginalis
In 3 days ~20% in a week ~30%
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 |
With luck
About 10% of wildlife watchers report a Margined White sighting in Anchorage on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 51st most-seen of the 59 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
In that month about 20% of wildlife watchers report a Margined White in Anchorage on a given day, against under 5% in July to May, the lowest months.
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 5 cities where we can rate Margined White sightings, Anchorage ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Vancouver (Canada, about 10%).
Same order: Lepidoptera
The closest relatives of the Margined White that you can see in Anchorage (order Lepidoptera, Butterflies and Moths) are Milbert's Tortoiseshell (about 20%), Canadian Tiger Swallowtail (about 10%) and Pale Beauty (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Margined White is recorded against all the insects logged in Anchorage (5 verified sightings), 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.
