Nymphalis antiopa
In 3 days ~40% in a week ~60%
Nymphalis antiopa, known as the mourning cloak in North America and the Camberwell beauty in Britain, is a large butterfly native to Eurasia and North America. The immature form of this species is sometimes known as the spiny elm caterpillar. Other older names for this species include grand surprise and white petticoat. A powerful flier, this species is sometimes found in areas far from its usual range during migration.
These butterflies have a lifespan of 11 to 12 months, one of the longest lifespans for any butterfly. It is the state insect of the U.S. state of Montana, adopted in 2001. The specific epithet antiopa is thought to be derived from Antiope, a common name in Greek mythology.
In several European countries with Germanic languages, other than Britain, the name for this butterfly literally translates to "mourning cloak", such as German "Trauermantel", Dutch "rouwmantel", Swedish "sorgmantel" and Norwegian "sørgekåpe". Finnish "suruvaippa" is also a calque of the Germanic names. This suggests it is a name which came with Scandinavian or German rather than with British settlers, for whom this species would be considerably... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Toluca | 🇲🇽 México | |
| 2 | Tijuana | 🇲🇽 México | |
| 3 | Edmonton | 🇨🇦 Canada | |
| 4 | Los Angeles | 🇺🇸 United States | |
| 5 | San Diego | 🇺🇸 United States | |
| 6 | Mexico City | 🇲🇽 México | |
| 7 | Toronto | 🇨🇦 Canada | |
| 8 | Calgary | 🇨🇦 Canada | |
| 9 | Puebla | 🇲🇽 México | |
| 10 | Montreal | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Mourning Cloak sighting in Rocky Mountain National Park on a given day, based on 58 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 16th 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 60%, if each day is a fresh chance.
April
In that month about 30% of wildlife watchers report a Mourning Cloak in Rocky Mountain National Park on a given day, against under 5% in November to March, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Mourning Cloak sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
26th of 43
Of the 43 parks where we can rate Mourning Cloak sightings, Rocky Mountain National Park ranks 26th at about 10%. The best odds are in Tatra National Park (Slovakia, about 40%), Aigüestortes National Park (Spain, about 30%) and Elk Island National Park (Canada, about 30%).
Same family: Nymphalidae
The closest relatives of the Mourning Cloak 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 Mourning Cloak is recorded against all the insects logged in Rocky Mountain National Park (58 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.
