Egira hiemalis
In 3 days ~10% in a week ~20%
Egira hiemalis is a moth of the family Noctuidae. It is found in western North America from British Columbia south to California. The wingspan is about 36 mm. In the Pacific Northwest and California, adults are on wing in winter through early spring. In British Columbia, they are on wing later in spring.
Larvae feed on various plants depending on range. These include Pseudotsuga menziesii, Abies amabilis, Abies grandis, Tsuga heterophylla, Purshia tridentata, Corylus cornuta, and Fraxinus latifolia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Egira hiemalis sighting in San Francisco on a given day, based on 42 verified sightings from GBIF citizen-science data. It is the 272nd most-seen of the 737 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
February
In that month about 10% of wildlife watchers report an Egira hiemalis in San Francisco on a given day, against under 5% in March to January, the lowest months. That is one of San Francisco's wettest months, with about 90 mm of rain against almost none in July.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Egira hiemalis sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Only San Francisco, in our data
San Francisco is the only city on Wallace's Line with enough records to rate Egira hiemalis sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Egira hiemalis is recorded against all the insects logged in San Francisco (42 verified sightings), 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.
