Digrammia gnophosaria
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Hollow-Spotted Angle sighting in Houston on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 847th most-seen of the 1057 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 Hollow-Spotted Angle in Houston on a given day, so our monthly data shows no clear season.
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.
Among the best
Of the 8 cities where we can rate Hollow-Spotted Angle sightings, Houston ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Baltimore (United States, under 5%), Austin (United States, under 5%) and Dallas (United States, under 5%).
Same family: Geometridae
The closest relatives of the Hollow-Spotted Angle that you can see in Houston (family Geometridae, Geometer Moths) are Pannaria Wave (about 10%), White-Tipped Black (about 10%) and Southern Emerald (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 Houston (7 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.
