Ctenucha rubroscapus
In 3 days ~20% in a week ~30%
Ctenucha rubroscapus, the red-shouldered ctenucha moth, is a moth of the family Erebidae. It was described by Édouard Ménétries in 1857. It is found in western North America, limited to low elevations west of the Cascade Mountains, south of Chehalis in Washington. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Redwood National Park | 🇺🇸 United States | |
| 2 | Yosemite National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a White-Tipped Ctenucha sighting in Yosemite National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 134th most-seen of the 227 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
July
In that month about 10% of wildlife watchers report a White-Tipped Ctenucha in Yosemite National Park on a given day, against under 5% in August to June, the lowest months. That is one of Yosemite National Park's driest months, with about 25 mm of rain against 220 mm in January.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most White-Tipped Ctenucha sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate White-Tipped Ctenucha sightings, Yosemite National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Redwood National Park (United States, about 10%).
Same family: Erebidae
The closest relatives of the White-Tipped Ctenucha that you can see in Yosemite National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Silver-Spotted Tiger Moth (about 20%), Isabella Tiger Moth (about 10%) and Wild Forget-Me-Not Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the White-Tipped Ctenucha is recorded against all the insects logged in Yosemite National Park (9 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.
