Campaea perlata
In 3 days ~20% in a week ~30%
Campaea perlata, the pale beauty, also known as the fringed looper (caterpillar), is a species of moth in the family Geometridae, known as geometer moths, found in North America. Some sources also name it the light emerald, though this may be confused with the related European moth Campaea margaritata. It is common throughout its range.
The name "perlata" comes from post-classical Latin for "pearly". The pale beauty is a medium-sized moth with an average wingspan of about 28–51 mm. The female tends to be much larger than the male. It is pale greenish to white, with postmedial and antemedial faint lines that run continuously across the forewings and hindwings.
The larva of the pale beauty falls in the category of "inchworms" or "loopers". The looping gait of these caterpillars is the result of having appendages only at the front and back of the body. The caterpillars are about 4 cm in length and mottled gray to reddish, pale underneath, with a dark band from the top of the head to the eye. It has a fringe-like row of setae on the lower sides of the body and an extra set of prolegs on the fifth segment of the abdomen (i.e. the 8th segment of the animal). The caterpillars... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Gros Morne National Park | 🇨🇦 Canada | |
| 3 | Shenandoah National Park | 🇺🇸 United States | |
| 4 | Cape Breton Highlands National Park | 🇨🇦 Canada | |
| 5 | Acadia National Park | 🇺🇸 United States | |
| 6 | Redwood National Park | 🇺🇸 United States | |
| 7 | Elk Island National Park | 🇨🇦 Canada | |
| 8 | Pacific Rim National Park Reserve | 🇨🇦 Canada | |
| 9 | Great Bear Rainforest | 🇨🇦 Canada | |
| 10 | Jasper National Park | 🇨🇦 Canada | |
| 11 | Olympic National Park | 🇺🇸 United States | |
| 12 | Banff National Park | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Anchorage | 🇺🇸 United States | |
| 2 | Boston | 🇺🇸 United States | |
| 3 | Detroit | 🇺🇸 United States | |
| 4 | Toronto | 🇨🇦 Canada | |
| 5 | Montreal | 🇨🇦 Canada | |
| 6 | Baltimore | 🇺🇸 United States | |
| 7 | Seattle | 🇺🇸 United States | |
| 8 | Edmonton | 🇨🇦 Canada | |
| 9 | Vancouver | 🇨🇦 Canada | |
| 10 | Washington | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Pale Beauty sighting in Montreal on a given day, based on 87 verified sightings from GBIF citizen-science data. It is the 142nd most-seen of the 926 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
June and August–September
In those months about 10% of wildlife watchers report a Pale Beauty in Montreal on a given day, against under 5% in July and October–May, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Pale Beauty sightings with a recorded time, and about 7 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 15 cities where we can rate Pale Beauty sightings, Montreal ranks 5th at about 10%, level with the leaders once rounded. The best odds are in Anchorage (United States, about 10%), Boston (United States, about 10%) and Detroit (United States, about 10%).
Same family: Geometridae
The closest relatives of the Pale Beauty that you can see in Montreal (family Geometridae, Geometer Moths) are Lesser Maple Spanworm Moth (about 10%), Chickweed Geometer Moth (about 10%) and Single-Dotted Wave (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pale Beauty is recorded against all the insects logged in Montreal (87 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.
