Catocala antinympha
In 3 days ~10% in a week ~30%
Catocala antinympha, the sweetfern underwing, is a moth of the family Erebidae. It is found from Quebec and Ontario east to Nova Scotia and south to Connecticut, Rhode Island, New York, Massachusetts, Pennsylvania and Maryland.
The wingspan is 45–55 mm. Adults are on wing from July to September. There is one generation per year. The larvae feed on Comptonia peregrina. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Sweetfern Underwing Moth sighting in Acadia National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 304th most-seen of the 405 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.
July
In that month about 10% of wildlife watchers report a Sweetfern Underwing Moth in Acadia National Park on a given day, against under 5% in August to June, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Sweetfern Underwing Moth sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Acadia National Park, in our data
Acadia National Park is the only park on Wallace's Line with enough records to rate Sweetfern Underwing Moth sightings: under 5% of wildlife watchers there report one on a given day.
Same genus: Catocala
The closest relatives of the Sweetfern Underwing Moth that you can see in Acadia National Park (genus Catocala, Underwing Moths) are Ilia Underwing (about 10%), Sordid Underwing (about 10%) and White Underwing (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sweetfern Underwing Moth is recorded against all the insects logged in Acadia National Park (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.
