Eudryas unio
In 3 days ~30% in a week ~50%
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 |
With luck
About 10% of wildlife watchers report a Pearly Wood-Nymph sighting in Everglades National Park on a given day, based on 40 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 106th most-seen of the 496 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
January and February
In those months about 20% of wildlife watchers report a Pearly Wood-Nymph in Everglades National Park on a given day, against under 5% in April and June–October, the lowest months. Those are among Everglades National Park's driest months, with about 50 mm of rain a month against 240 mm in June.
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.
2nd of 2
Of the 2 parks where we can rate Pearly Wood-Nymph sightings, Everglades National Park ranks 2nd at about 10%. The best odds are in Point Pelee National Park (Canada, about 20%).
Same family: Noctuidae
The closest relatives of the Pearly Wood-Nymph that you can see in Everglades National Park (family Noctuidae, Cutworm Moths and Allies) are Spanish Moth (about 20%), Florida Fern Moth (about 10%) and Straight-Lined Seed Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pearly Wood-Nymph is recorded against all the insects logged in Everglades National Park (40 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.
