Cydia latiferreana
In 3 days ~10% in a week ~20%
Cydia latiferreana, the filbertworm moth, is a moth of the family Tortricidae. It was formerly (and sometimes is still) separated in a monotypic genus Melissopus. It is found in most of North America. The wingspan is about 18 mm. Adults are on wing from July to October depending on the location.
The larvae (filbertworms) feed on the acorns of Quercus alba (white oak), Quercus macrocarpa, Quercus rubra and Quercus velutina but are most noted for feeding on hazelnuts—seeds of the genus Corylus—and are a major pest of hazelnut orchards in the Pacific northwest. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | Houston | 🇺🇸 United States | |
| 4 | Boston | 🇺🇸 United States | |
| 5 | Baltimore | 🇺🇸 United States | |
| 6 | Chicago | 🇺🇸 United States | |
| 7 | Sacramento | 🇺🇸 United States | |
| 8 | Washington | 🇺🇸 United States | |
| 9 | San Francisco | 🇺🇸 United States | |
| 10 | San Antonio | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Filbertworm Moth sighting in San Francisco on a given day, based on 93 verified sightings from GBIF citizen-science data. It is the 168th 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.
August and September
In those months about 10% of wildlife watchers report a Filbertworm Moth in San Francisco on a given day, against under 5% in October to July, the lowest months. Those are among San Francisco's driest months, with almost no rain against 110 mm in December.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Filbertworm Moth sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
9th of 16
Of the 16 cities where we can rate Filbertworm Moth sightings, San Francisco ranks 9th at under 5%. The best odds are in Austin (United States, about 10%), Dallas (United States, about 10%) and Houston (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Filbertworm Moth is recorded against all the insects logged in San Francisco (93 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.
