Aseptis binotata
In 3 days ~10%
Aseptis binotata, the rusty shoulder knot moth, is a moth of the family Noctuidae. The species was first described by Francis Walker in 1865. It is found widespread in western North America, west of south-central Alberta, Wyoming, and Nebraska. Along the Pacific Coast it occurs from northern Mexico to south-central British Columbia. It can be found from sea level to altitudes over 2000 meters in a variety of habitats from dense forest to shrub desert.
The wingspan is 29.5–35 mm. It is the most variable species in the genus Aseptis with respect to forewing color and pattern strength. It may be brownish, warm dark brown, pale to medium gray brown, yellowish light brown, or reddish brown depending on locality. The most noticeable marking in dark specimens is the large pale yellowish postreniform patch, which is bisected by the dark postmedial line. The antemedial line is strongly convex laterally and is filled with light tan. Black forewing markings include a series of wedges near the outer margin below the apex, the outlines of the three forewing spots, and in most specimens a short black basal dash. Pale specimens can be washed out or have contrasting dark markings. In the south the flight begins in March at low elevations and in April to July in the mountains. In the north the flight begins later and lasts into August.
The larvae feed on various broadleaf trees and shrubs, including big-leaf maple, ocean spray, and Ceanothus species. Other recorded food plants include Oemleria, Symphoricarpos and Ribes species. The larva is green with a white and red lateral stripe. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
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 a Rusty Shoulder Knot Moth sighting in San Francisco on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 622nd most-seen of the 737 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Rusty Shoulder Knot Moth in San Francisco on a given day, so our monthly data shows no clear season.
Only San Francisco, in our data
San Francisco is the only city on Wallace's Line with enough records to rate Rusty Shoulder Knot Moth sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Rusty Shoulder Knot Moth is recorded against all the insects logged in San Francisco (9 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.
