Hesperumia sulphuraria
In 3 days ~20% in a week ~40%
Hesperumia sulphuraria, commonly known as the sulphur moth or sulphur wave, is a species of geometrid moth in the family Geometridae. It is found in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States | |
| 2 | Glacier National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Edmonton | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Sulphur Moth sighting in Acadia National Park on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 164th most-seen of the 405 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
In that month about 20% of wildlife watchers report a Sulphur Moth in Acadia National Park on a given day, against under 5% in September to June, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Sulphur Moth sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 2 parks where we can rate Sulphur Moth sightings, Acadia National Park has the highest daily chance: about 10%. Next come Glacier National Park (United States, about 10%).
Same family: Geometridae
The closest relatives of the Sulphur Moth that you can see in Acadia National Park (family Geometridae, Geometer Moths) are Sweetfern Geometer Moth (about 10%), Pale Beauty (about 10%) and Gray Spruce Looper Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sulphur Moth is recorded against all the insects logged in Acadia National Park (16 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.
