Hydriomena nubilofasciata
In 3 days ~10% in a week ~20%
Hydriomena nubilofasciata, the oak winter highflier, is a species of geometrid moth in the family Geometridae. It is found in North America. The adults reach a wingspan of 24–30 mm and appear around oaks in late January and February.
The MONA or Hodges number for Hydriomena nubilofasciata is 7276. 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 | Sacramento | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Oak Winter Highflier sighting in San Francisco on a given day, based on 198 verified sightings from GBIF citizen-science data. It is the 137th 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.
January and February
In those months about 10% of wildlife watchers report an Oak Winter Highflier in San Francisco on a given day, against under 5% in March to December, the lowest months. Those are among San Francisco's wettest months, with about 90 mm of rain a month against almost none in July.
Yes
Of the 2 cities where we can rate Oak Winter Highflier sightings, San Francisco has the highest daily chance: under 5%. Next come Sacramento (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Oak Winter Highflier is recorded against all the insects logged in San Francisco (198 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.
