Parallelia bistriaris
In 3 days ~20% in a week ~50%
Parallelia bistriaris, the maple looper moth, is a moth of the family Erebidae. The species was first described by Jacob Hübner in 1818. It is found in eastern North America. The wingspan is 33–43 mm (1.3–1.7 in). Adults are on wing from April to September. There is one generation per year.
The larvae feed on various trees, including birch, maple, and walnut. This species utilizes camouflage in both its larval and adult forms, resembling twigs and dead leaves, respectively. This species as an adult is most readily identified by its dark brown body, two parallel lighter lines going down the length of the body, and a grey edge that extends to the edge of the forewing, resembling fallen leaves. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Baltimore | 🇺🇸 United States | |
| 2 | Washington | 🇺🇸 United States | |
| 3 | New York City | 🇺🇸 United States | |
| 4 | Montreal | 🇨🇦 Canada | |
| 5 | Philadelphia | 🇺🇸 United States | |
| 6 | Toronto | 🇨🇦 Canada | |
| 7 | Boston | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Maple Looper Moth sighting in Acadia National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 132nd most-seen of the 405 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.
July
In that month about 20% of wildlife watchers report a Maple Looper Moth in Acadia National Park on a given day, against under 5% in October to June, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Maple Looper Moth sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 3 parks where we can rate Maple Looper Moth sightings, Acadia National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Great Smoky Mountains National Park (United States, about 10%).
Same family: Erebidae
The closest relatives of the Maple Looper Moth that you can see in Acadia National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Hickory Tussock Moth (about 30%), Brown-Tail Moth (about 20%) and Isabella Tiger Moth (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Maple Looper Moth is recorded against all the insects logged in Acadia National Park (20 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.
