Polia nimbosa
In 3 days ~20% in a week ~40%
Polia nimbosa, the stormy arches, is a species of cutworm or dart moth in the family Noctuidae. It is found in North America. The MONA or Hodges number for Polia nimbosa is 10275. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Pacific Rim National Park Reserve | 🇨🇦 Canada |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Stormy Arches sighting in Pacific Rim National Park Reserve on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 78th most-seen of the 107 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 Stormy Arches in Pacific Rim National Park Reserve on a given day, against under 5% in September to June, the lowest months. That is one of Pacific Rim National Park Reserve's driest months, with about 40 mm of rain against 470 mm in November.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Stormy Arches sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Pacific Rim National Park Reserve, in our data
Pacific Rim National Park Reserve is the only park on Wallace's Line with enough records to rate Stormy Arches sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Noctuidae
The closest relatives of the Stormy Arches that you can see in Pacific Rim National Park Reserve (family Noctuidae, Cutworm Moths and Allies) are Large Yellow Underwing (about 10%), Western Panthea Moth (about 10%) and Pale Glyph (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Stormy Arches is recorded against all the insects logged in Pacific Rim National Park Reserve (13 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.
