Anthocharis julia
In 3 days ~20% in a week ~40%
Anthocharis julia, also known as the Southern Rocky Mountain Orangetip, is a type of butterfly found in the southern Rocky Mountains on the eastern side of the range. Their caterpillars feed on rock cress (Arabis) species. Adults feed on flower nectar from host plants as well as thistles, fiddleneck, and brodiaeas. Its habitats include forested riparian areas, canyons among foothills, and washes, usually in oak woodland. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grand Teton National Park | 🇺🇸 United States | |
| 2 | Olympic National Park | 🇺🇸 United States | |
| 3 | Glacier National Park | 🇺🇸 United States | |
| 4 | Yellowstone National Park | 🇺🇸 United States | |
| 5 | Rocky Mountain National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Julia Orangetip sighting in Yellowstone National Park on a given day, based on 25 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 55th most-seen of the 160 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.
May to July
In those months about 10% of wildlife watchers report a Julia Orangetip in Yellowstone National Park on a given day, against under 5% in August to April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Julia Orangetip sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 parks where we can rate Julia Orangetip sightings, Yellowstone National Park ranks 4th at about 10%. The best odds are in Grand Teton National Park (United States, about 20%), Olympic National Park (United States, about 10%) and Glacier National Park (United States, about 10%).
Same family: Pieridae
The closest relatives of the Julia Orangetip that you can see in Yellowstone National Park (family Pieridae, Whites, Yellows, and Sulphurs) are Clouded Sulphur (about 10%), Margined White (about 10%) and Small White (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Julia Orangetip is recorded against all the insects logged in Yellowstone National Park (25 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.
