Colias interior
In 3 days ~20% in a week ~40%
Colias interior, the pink-edged sulphur, is a species of North American butterfly in the family Pieridae. It is the State Butterfly of Maine. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Elk Island National Park | 🇨🇦 Canada | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Glacier National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Pink-Edged Sulphur sighting in Glacier National Park on a given day, based on 14 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.
June and July
In those months about 10% of wildlife watchers report a Pink-Edged Sulphur in Glacier National Park on a given day, against under 5% in August to May, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Pink-Edged Sulphur 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 3 parks where we can rate Pink-Edged Sulphur sightings, Glacier National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Elk Island National Park (Canada, about 10%) and Acadia National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Pink-Edged Sulphur is recorded against all the insects logged in Glacier National Park (14 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.
