Thalera pistasciaria
In 3 days ~10% in a week ~30%
Thalera pistasciaria is a species of moth in the family Geometridae. It was first described by Achille Guenée in 1857 and has been found in eastern and central North America from Nova Scotia to Manitoba, and south to South Carolina and Alabama. 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 Pistachio Emerald sighting in Great Smoky Mountains National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 441st 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.
April and May
In those months about 10% of wildlife watchers report a Pistachio Emerald in Great Smoky Mountains National Park on a given day, against under 5% in June to March, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Pistachio Emerald 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 Pistachio Emerald sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Pistachio Emerald 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 Pistachio Emerald is recorded against all the insects logged in Great Smoky Mountains National Park (12 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.
