Allotria elonympha
In 3 days ~10% in a week ~20%
Allotria is a genus of moths in the family Erebidae. It is monotypic, with only a single species, Allotria elonympha, the false underwing moth, which is found in eastern North America. Both the genus and the species were first described by Jacob Hübner, the genus in 1823 and the species in 1818.
The wingspan is 33–44 mm. Adults are on wing from March to September. The larvae feed on various deciduous trees, such as black gum (Nyssa sylvatica), hickory and walnut. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Baltimore | 🇺🇸 United States | |
| 2 | Washington | 🇺🇸 United States | |
| 3 | Philadelphia | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a False Underwing sighting in Philadelphia on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 557th most-seen of the 632 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a False Underwing in Philadelphia on a given day, so our monthly data shows no clear season.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most False Underwing sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Among the best
Of the 3 cities where we can rate False Underwing sightings, Philadelphia ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Baltimore (United States, under 5%) and Washington (United States, under 5%).
Same family: Erebidae
The closest relatives of the False Underwing that you can see in Philadelphia (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Giant Leopard Moth (about 10%), Isabella Tiger Moth (about 10%) and Green Cloverworm Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the False Underwing is recorded against all the insects logged in Philadelphia (5 verified sightings), 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.
