Cercyonis oetus
In 3 days ~10% in a week ~30%
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 |
Rare
Under 5% of wildlife watchers report a Small Wood-Nymph sighting in Banff National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 89th most-seen of the 105 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
August
In that month about 10% of wildlife watchers report a Small Wood-Nymph in Banff National Park on a given day, against under 5% in September to July, 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.
6th of 6
Of the 6 parks where we can rate Small Wood-Nymph sightings, Banff National Park ranks 6th at under 5%. The best odds are in Rocky Mountain National Park (United States, about 20%), 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 Banff National Park (family Nymphalidae, Brush-footed Butterflies) are Pearl Crescent (about 30%), Milbert's Tortoiseshell (about 20%) and Mourning Cloak (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 Banff National Park (9 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.
