Eugonobapta nivosaria
In 3 days ~10% in a week ~30%
Eugonobapta is a monotypic moth genus in the family Geometridae described by Warren in 1894. Its only species, Eugonobapta nivosaria, the snowy geometer, was first described by Achille Guenée in 1857. It is found in North America from Manitoba to New Brunswick, south to North Carolina and Tennessee.
The wingspan is 21–33 mm. Adults are on wing from April or May to July or August depending on the location. There are two generations per year. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Snowy Geometer Moth sighting in Great Smoky Mountains National Park on a given day, based on 17 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 513th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
June and July
In those months about 10% of wildlife watchers report a Snowy Geometer Moth in Great Smoky Mountains National Park on a given day, against under 5% in August to May, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Snowy Geometer Moth sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Great Smoky Mountains National Park, in our data
Great Smoky Mountains National Park is the only park on Wallace's Line with enough records to rate Snowy Geometer Moth sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Snowy Geometer Moth that you can see in Great Smoky Mountains National Park (family Geometridae, Geometer Moths) are Tulip-Tree Beauty (about 30%), White-Striped Black (about 20%) and Pale Beauty (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Snowy Geometer Moth is recorded against all the insects logged in Great Smoky Mountains National Park (17 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.
