Digrammia gnophosaria
In 3 days ~20% in a week ~50%
Digrammia gnophosaria, the hollow-spotted angle, is a species of moth of the family Geometridae. It is found in Illinois, Louisiana, Minnesota, New Jersey, North Carolina, Oklahoma, Texas and Wisconsin. The larvae feed on Salix species, including Salix babylonica. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Cypress National Preserve | 🇺🇸 United States | |
| 2 | Everglades National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Baltimore | 🇺🇸 United States | |
| 2 | Austin | 🇺🇸 United States | |
| 3 | Dallas | 🇺🇸 United States | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | Chicago | 🇺🇸 United States | |
| 6 | Toronto | 🇨🇦 Canada | |
| 7 | Washington | 🇺🇸 United States | |
| 8 | New York City | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Hollow-Spotted Angle sighting in Big Cypress National Preserve on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 154th most-seen of the 262 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
May and June
In those months about 20% of wildlife watchers report a Hollow-Spotted Angle in Big Cypress National Preserve on a given day, against under 5% in July to January, the lowest months. Those are among Big Cypress National Preserve's wettest months, with about 200 mm of rain a month against 40 mm in March.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Hollow-Spotted Angle sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Yes
Of the 2 parks where we can rate Hollow-Spotted Angle sightings, Big Cypress National Preserve has the highest daily chance: about 10%. Next come Everglades National Park (United States, under 5%).
Same family: Geometridae
The closest relatives of the Hollow-Spotted Angle that you can see in Big Cypress National Preserve (family Geometridae, Geometer Moths) are Cypress Emerald (about 10%), Raspberry Wave (about 10%) and Swag-Lined Wave (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hollow-Spotted Angle is recorded against all the insects logged in Big Cypress National Preserve (9 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.
