Pygarctia murina
In 3 days ~10% in a week ~30%
Pygarctia murina, the mouse-colored euchaetias, is a moth in the family Erebidae. It was described by Richard Harper Stretch in 1885. It is found in the United States in south-western Utah, from southern Colorado to south-eastern California and in southern Texas.
The wingspan is 26–33 mm. Adults are on wing from late July to September. Larvae feed on Euphorbia species and have also been reared on Funastrum species. They reach a length of about 22 mm when fully grown. Pupation takes place in a silken cocoon within surface debris. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Mouse-Colored Euchaetes sighting in Saguaro National Park on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 176th most-seen of the 354 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June to August
In those months about 10% of wildlife watchers report a Mouse-Colored Euchaetes in Saguaro National Park on a given day, against under 5% in September to May, the lowest months.
Between midnight and 3 am
Across all the parks we cover, that three-hour window holds the most Mouse-Colored Euchaetes sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
Only Saguaro National Park, in our data
Saguaro National Park is the only park on Wallace's Line with enough records to rate Mouse-Colored Euchaetes sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Erebidae
The closest relatives of the Mouse-Colored Euchaetes that you can see in Saguaro National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Black Witch (about 10%), Merry Graphic Moth (about 10%) and Bird Toxonprucha (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mouse-Colored Euchaetes is recorded against all the insects logged in Saguaro National Park (13 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.
