Eudryas unio
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Pearly Wood-Nymph sighting in New York City on a given day, based on 20 verified sightings from GBIF citizen-science data. It is the 710th most-seen of the 1623 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 Pearly Wood-Nymph in New York City on a given day, so our monthly data shows no clear season.
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.
Among the best
Of the 7 cities where we can rate Pearly Wood-Nymph sightings, New York City ranks 6th at under 5%, level with the leaders once rounded. The best odds are in Philadelphia (United States, under 5%), Toronto (Canada, under 5%) and Boston (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Pearly Wood-Nymph is recorded against all the insects logged in New York City (20 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.
