Deidamia inscriptum
In 3 days ~10% in a week ~30%
Deidamia inscriptum, the lettered sphinx, is a species of moth of the family Sphingidae. It is the only member of the genus Deidamia. The species was first described by Thaddeus William Harris in 1839 and the genus was erected by James Brackenridge Clemens in 1859. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Point Pelee National Park | 🇨🇦 Canada | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Montreal | 🇨🇦 Canada | |
| 5 | Dallas | 🇺🇸 United States | |
| 6 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Lettered Sphinx sighting in Great Smoky Mountains National Park on a given day, based on 7 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.
March to May
In those months about 10% of wildlife watchers report a Lettered Sphinx in Great Smoky Mountains National Park on a given day, against under 5% in June to February, the lowest months.
Between 5 and 8 am
Across all the parks we cover, that three-hour window holds the most Lettered Sphinx sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
2nd of 2
Of the 2 parks where we can rate Lettered Sphinx sightings, Great Smoky Mountains National Park ranks 2nd at under 5%. The best odds are in Point Pelee National Park (Canada, about 10%).
Same family: Sphingidae
The closest relatives of the Lettered Sphinx that you can see in Great Smoky Mountains National Park (family Sphingidae, Sphinx Moths) are Virginia Creeper Sphinx (about 10%), Blinded Sphinx (about 10%) and Walnut Sphinx (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Lettered Sphinx is recorded against all the insects logged in Great Smoky Mountains National Park (7 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.
