Oeneis jutta
In 3 days ~10% in a week ~30%
Oeneis jutta, the Jutta Arctic or Baltic grayling, is a species of butterfly in the subfamily Satyrinae with a Circumboreal distribution. It occurs in bogs and tundra in the north of Europe, the Baltic states, the Urals, Siberia, northern Kazakhstan, the Russian Far East, northern Mongolia, northeastern China, North Korea, and northern North America (Canada from Newfoundland to British Columbia). Larvae feed on Carex and Eriophorum, possibly also Glyceria, Molinia, and Juncus. Ledum palustre is the preferred nectar plant of the adult butterflies. The species has one generation every one or two years, depending on the location. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Denali National Park | 🇺🇸 United States | |
| 2 | Grand Teton National Park | 🇺🇸 United States | |
| 3 | Yellowstone National Park | 🇺🇸 United States | |
| 4 | Rocky Mountain National Park | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Jutta Arctic sighting in Rocky Mountain National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 172nd most-seen of the 191 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.
June
In that month about 10% of wildlife watchers report a Jutta Arctic in Rocky Mountain National Park on a given day, against under 5% in July to May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Jutta Arctic sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 4
Of the 4 parks where we can rate Jutta Arctic sightings, Rocky Mountain National Park ranks 4th at under 5%. The best odds are in Denali National Park (United States, about 20%), Grand Teton National Park (United States, about 10%) and Yellowstone National Park (United States, under 5%).
Same genus: Oeneis
The closest relatives of the Jutta Arctic that you can see in Rocky Mountain National Park (genus Oeneis, Arctics) are Chryxus Arctic (about 10%) and Melissa Arctic (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Jutta Arctic is recorded against all the insects logged in Rocky Mountain National Park (7 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.
