Synaxis jubararia
In 3 days ~30% in a week ~50%
Tetracis jubararia, commonly known as the October Thorn, is a moth of the family Geometridae. This species is known for flying in the fall and having an angular wing shape and colors of ochres and browns that resemble autumn leaves. It is found in western North America.
It was first described by Hulst in 1886, then by McDunnough in 1938 as Synaxis jubararia. The genus Synaxis was synonymized with Tetracis by Ferris & Schmidt in 2010. The Holotype was collected in Seattle, Washington. Tetracis jubararia jubararia (southern California northward to British Columbia and eastward to central Saskatchewan, southwestern Idaho, and White Pine County, Nevada at elevations from 150 to 2255 meters)
Tetracis jubararia sericeata (Rocky Mountain and Intermountain Regions from 1,830 to 2,590 meters) is a buff (pale yellow-ochre) variation. It widely distributed in Western coniferous, mixed, and deciduous forests. Moth of ssp. jubararia range across the northwestern North America at elevation of 500-7,400 ft., including British Columbia, California, Idaho, Nevada, Saskatchewan, Oregon, and Washington. The subspecies ssp. sericeata is found... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Pacific Rim National Park Reserve | 🇨🇦 Canada | |
| 2 | Great Bear Rainforest | 🇨🇦 Canada | |
| 3 | Olympic National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | Seattle | 🇺🇸 United States | |
| 3 | Calgary | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report an October Thorn sighting in Pacific Rim National Park Reserve on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 47th most-seen of the 107 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
September
In that month about 40% of wildlife watchers report an October Thorn in Pacific Rim National Park Reserve on a given day, against under 5% in November to August, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most October Thorn sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 parks where we can rate October Thorn sightings, Pacific Rim National Park Reserve has the highest daily chance: about 10%. Next come Great Bear Rainforest (Canada, under 5%) and Olympic National Park (United States, under 5%).
Same family: Geometridae
The closest relatives of the October Thorn that you can see in Pacific Rim National Park Reserve (family Geometridae, Geometer Moths) are Brown-Lined Looper (about 10%), Welsh Wave Moth (about 10%) and Gray Spruce Looper Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the October Thorn is recorded against all the insects logged in Pacific Rim National Park Reserve (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.
