Phigalia plumogeraria
In 3 days ~20% in a week ~40%
Phigalia plumogeraria, the walnut spanworm moth, is a species of geometrid moth in the family Geometridae. The MONA or Hodges number for Phigalia plumogeraria is 6661. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | San Francisco | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Walnut Spanworm Moth sighting in Sequoia and Kings Canyon National Parks on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 114th most-seen of the 161 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
January
In that month about 70% of wildlife watchers report a Walnut Spanworm Moth in Sequoia and Kings Canyon National Parks on a given day, against under 5% in February to December, the lowest months. That is one of Sequoia and Kings Canyon National Parks's wettest months, with about 190 mm of rain against 10 mm in September.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Walnut Spanworm Moth sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Only Sequoia and Kings Canyon National Parks, in our data
Sequoia and Kings Canyon National Parks is the only park on Wallace's Line with enough records to rate Walnut Spanworm Moth sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Walnut Spanworm Moth that you can see in Sequoia and Kings Canyon National Parks (family Geometridae, Geometer Moths) are Omnivorous Looper (about 10%) and Eupithecia zelmira (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Walnut Spanworm Moth is recorded against all the insects logged in Sequoia and Kings Canyon National Parks (6 verified sightings from 2019 to 2026), 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.
