Horisme intestinata
In 3 days ~10% in a week ~20%
Horisme intestinata, the brown bark carpet moth, is a moth of the family Geometridae. It is widespread throughout most of temperate North America. The habitat consists of wooded areas. The wingspan is 21–32 mm. Adults are on wing from late May to late July and again from early September to early October.
The larvae have been recorded feeding on garden Clematis. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Baltimore | 🇺🇸 United States | |
| 3 | Philadelphia | 🇺🇸 United States | |
| 4 | Boston | 🇺🇸 United States | |
| 5 | Washington | 🇺🇸 United States | |
| 6 | Chicago | 🇺🇸 United States | |
| 7 | Toronto | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Brown Bark Carpet Moth sighting in Boston on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 830th most-seen of the 1200 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 Brown Bark Carpet Moth in Boston on a given day, so our monthly data shows no clear season.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Brown Bark Carpet Moth sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Among the best
Of the 7 cities where we can rate Brown Bark Carpet Moth sightings, Boston ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Austin (United States, under 5%), Baltimore (United States, under 5%) and Philadelphia (United States, under 5%).
Same family: Geometridae
The closest relatives of the Brown Bark Carpet Moth that you can see in Boston (family Geometridae, Geometer Moths) are Pale Beauty (about 10%), Single-Dotted Wave (about 10%) and Winter Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Brown Bark Carpet Moth is recorded against all the insects logged in Boston (8 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.
