Stigmella longisacca
In 3 days ~10% in a week ~20%
Stigmella longisacca is a moth of the family Nepticulidae. It is found in California, United States. The wingspan is 3.2-4.4 mm. There are two and possibly three generations per year. The larvae feed on Juglans species, including Juglans californica. They mine the leaves of their host plant. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Francisco | 🇺🇸 United States | |
| 2 | Los Angeles | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Stigmella longisacca sighting in San Francisco on a given day, based on 45 verified sightings from GBIF citizen-science data. It is the 242nd 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Stigmella longisacca in San Francisco on a given day, so our monthly data shows no clear season.
Yes
Of the 2 cities where we can rate Stigmella longisacca sightings, San Francisco has the highest daily chance: under 5%. Next come Los Angeles (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Stigmella longisacca is recorded against all the insects logged in San Francisco (45 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.
