Cercyonis oetus
In 3 days ~40% in a week ~70%
Cercyonis oetus, the small wood-nymph or dark wood-nymph, is a butterfly of the family Nymphalidae. It is found in western North America. The wingspan is 32–45 mm. Adults are on wing from June to August in one generation.
The larvae feed on various grasses. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rocky Mountain National Park | 🇺🇸 United States | |
| 2 | Grand Teton National Park | 🇺🇸 United States | |
| 3 | Glacier National Park | 🇺🇸 United States | |
| 4 | Yellowstone National Park | 🇺🇸 United States | |
| 5 | Grand Canyon National Park | 🇺🇸 United States | |
| 6 | Banff National Park | 🇨🇦 Canada |
Possible
About 20% of wildlife watchers report a Small Wood-Nymph sighting in Rocky Mountain National Park on a given day, based on 75 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 13th most-seen of the 191 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.
August
In that month about 30% of wildlife watchers report a Small Wood-Nymph in Rocky Mountain National Park on a given day, against under 5% in October to June, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Small Wood-Nymph sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 6 parks where we can rate Small Wood-Nymph sightings, Rocky Mountain National Park has the highest daily chance: about 20%. Next come Grand Teton National Park (United States, about 10%) and Glacier National Park (United States, about 10%).
Same family: Nymphalidae
The closest relatives of the Small Wood-Nymph that you can see in Rocky Mountain National Park (family Nymphalidae, Brush-footed Butterflies) are Weidemeyer's Admiral (about 30%), Hoary Comma (about 20%) and Red Admiral (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Small Wood-Nymph is recorded against all the insects logged in Rocky Mountain National Park (75 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.
