Orgyia antiqua
In 3 days ~20% in a week ~40%
Orgyia antiqua, the rusty tussock moth or vapourer, is a moth in the family Erebidae. O. antiqua is native to Europe, but now has a transcontinental distribution in the Palaearctic and the Nearctic regions. The species is not on the IUCN (2007) Red List; and in the UK is considered a common resident.
In the UK, O. antiqua may be encountered in a variety of shrub-based habitats, including gardens, parks, open woodland, fens, hedgerows, heaths, and moors. A striking dimorphism exists between the male and the female moths of this species. The male moth typically has orange- to red-brown (ochreous red and dark brown) wings; each fore wing has a white comma-shaped (tornal) spot. It has marked plumose (short, bipectinate) antennae. The wingspan measures between 35 and 38 mm. The female moth has vestigial wings and is flightless; it is light grey-brown (ochreous grey), has "shortly bipectinate" antennae, and a swollen abdomen. The compound eyes of the two sexes differ not only with regard to their size, number of facets and internal organization and ultrastructure, but also with regard to their sensitivity to ultraviolet radiation... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 2 | Denali National Park | 🇺🇸 United States | |
| 3 | Great Bear Rainforest | 🇨🇦 Canada | |
| 4 | Pacific Rim National Park Reserve | 🇨🇦 Canada | |
| 5 | Gros Morne National Park | 🇨🇦 Canada | |
| 6 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 7 | Glacier National Park | 🇺🇸 United States | |
| 8 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 9 | Redwood National Park | 🇺🇸 United States | |
| 10 | Acadia National Park | 🇺🇸 United States | |
| 11 | Cévennes National Park | 🇫🇷 France | |
| 12 | Pyrénées National Park | 🇫🇷 France | |
| 13 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | London | 🇬🇧 United Kingdom | |
| 5 | Leeds | 🇬🇧 United Kingdom | |
| 6 | Essen | 🇩🇪 Germany | |
| 7 | Dublin | 🇮🇪 Ireland | |
| 8 | Warsaw | 🇵🇱 Poland | |
| 9 | Vancouver | 🇨🇦 Canada | |
| 10 | Berlin | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Rusty Tussock Moth sighting in Glacier National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 68th most-seen of the 147 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.
July to September
In those months about 10% of wildlife watchers report a Rusty Tussock Moth in Glacier National Park on a given day, against under 5% in October to June, the lowest months. Those are among Glacier National Park's driest months, with about 35 mm of rain a month against 80 mm in February.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Rusty Tussock Moth sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
7th of 13
Of the 13 parks where we can rate Rusty Tussock Moth sightings, Glacier National Park ranks 7th at about 10%. The best odds are in Cairngorms National Park (United Kingdom, about 20%), Denali National Park (United States, about 10%) and Great Bear Rainforest (Canada, about 10%).
Same family: Erebidae
The closest relatives of the Rusty Tussock Moth that you can see in Glacier National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Spotted Tussock Moth (about 30%), Police Car Moth (about 20%) and Virginian Tiger Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rusty Tussock Moth is recorded against all the insects logged in Glacier National Park (12 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.
