Eudryas unio
In 3 days ~40% in a week ~70%
Eudryas unio, the pearly wood-nymph, is a species of moth of the family Noctuidae. It is found in most of the eastern United States from central New Hampshire and southern Ontario, south to southern Florida. In the west it ranges to the eastern Great Plains, south to southern Texas and Veracruz along the eastern coast of Mexico.
The wingspan is 26–35 mm. Adults are on wing from May to August. The larvae feed on Vitis, Oenothera biennis, Ludwigia, Lythrum, Decodon verticillatus and Hibiscus. Eudryas brevipennis was once considered a possible subspecies of Eudryas unio, however, the genitalia of both sexes differ between the species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Point Pelee National Park | 🇨🇦 Canada | |
| 2 | Everglades National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Philadelphia | 🇺🇸 United States | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 5 | Montreal | 🇨🇦 Canada | |
| 6 | New York City | 🇺🇸 United States | |
| 7 | Chicago | 🇺🇸 United States |
Possible
About 20% of wildlife watchers report a Pearly Wood-Nymph sighting in Point Pelee National Park on a given day, based on 33 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 36th most-seen of the 196 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
June
In that month about 40% of wildlife watchers report a Pearly Wood-Nymph in Point Pelee National Park on a given day, against under 5% in October to April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Pearly Wood-Nymph sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Pearly Wood-Nymph sightings, Point Pelee National Park has the highest daily chance: about 20%. Next come Everglades National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Pearly Wood-Nymph is recorded against all the insects logged in Point Pelee National Park (33 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.
