Adelphagrotis stellaris
In 3 days ~10% in a week ~20%
Adelphagrotis stellaris is a moth of the family Noctuidae. It is found along the West Coast from southern British Columbia east to the Cascades in the north and southward to the central California Coast Range. The wingspan is about 36 mm. Adults are on wing from July to August.
The larvae feed on a wide range of flowering trees and shrubs, including Vaccinium, Symphoricarpos, Rubus spectabilis and Oemleria cerasiformis. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Adelphagrotis stellaris sighting in Portland on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 402nd most-seen of the 507 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.
August
In that month about 10% of wildlife watchers report an Adelphagrotis stellaris in Portland on a given day, against under 5% in September to July, the lowest months. That is one of Portland's driest months, with about 20 mm of rain against 250 mm in December.
Only Portland, in our data
Portland is the only city on Wallace's Line with enough records to rate Adelphagrotis stellaris sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Noctuidae
The closest relatives of the Adelphagrotis stellaris that you can see in Portland (family Noctuidae, Cutworm Moths and Allies) are Large Yellow Underwing (about 20%), Lesser Yellow Underwing (about 10%) and Alfalfa Looper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Adelphagrotis stellaris is recorded against all the insects logged in Portland (7 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.
