Pyrausta semirubralis
In 3 days ~20% in a week ~40%
Pyrausta semirubralis is a moth in the family Crambidae. It was described by Alpheus Spring Packard in 1873. It is found in North America, where it has been recorded from southern British Columbia to California, Nevada, Colorado and Arizona. The habitat consists of coastal areas, reaching inland up to altitudes of about 9000 ft.
The length of the forewings is 9–11 mm. The basal half of the forewings is dull dark brown. The remaining area is dull brick red. The hindwings are faded brick red. Adults have been recorded on wing from April to September. peaking around May Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 2 | Yosemite National Park | 🇺🇸 United States | |
| 3 | Olympic National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Rusty Pyrausta sighting in Sequoia and Kings Canyon National Parks on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 137th most-seen of the 161 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.
June and July
In those months about 10% of wildlife watchers report a Rusty Pyrausta in Sequoia and Kings Canyon National Parks on a given day, against under 5% in August to May, the lowest months. Those are among Sequoia and Kings Canyon National Parks's driest months, with about 20 mm of rain a month against 190 mm in January.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Rusty Pyrausta 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 Rusty Pyrausta sightings, Sequoia and Kings Canyon National Parks has the highest daily chance: about 10%. Next come Yosemite National Park (United States, about 10%) and Olympic National Park (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Rusty Pyrausta is recorded against all the insects logged in Sequoia and Kings Canyon National Parks (7 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.
