Catocala flebilis
In 3 days ~10% in a week ~20%
Catocala flebilis, the mourning underwing, is a moth of the family Erebidae. The species was first described by Augustus Radcliffe Grote in 1872. It is found in North America from Massachusetts and Connecticut south to North Carolina and Georgia, west to Arkansas and north to Michigan and Illinois and into southern Ontario.
The wingspan is 45–65 mm. Adults are on wing from July to September depending on the location. The larvae feed on Carya glabra and Carya ovata. 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 Mourning Underwing sighting in Great Smoky Mountains National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 628th 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 20%, if each day is a fresh chance.
July and August
In those months about 10% of wildlife watchers report a Mourning Underwing in Great Smoky Mountains National Park on a given day, against under 5% in September to June, the lowest months.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Mourning Underwing sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is seen both by day and 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 Mourning Underwing sightings: under 5% of wildlife watchers there report one on a given day.
Same genus: Catocala
The closest relatives of the Mourning Underwing that you can see in Great Smoky Mountains National Park (genus Catocala, Underwing Moths) are Ilia Underwing (about 10%) and Epione Underwing (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mourning Underwing is recorded against all the insects logged in Great Smoky Mountains 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.
