Mesoleuca gratulata
In 3 days ~20% in a week ~30%
Mesoleuca gratulata, known generally as the western white-ribboned carpet or half-white carpet moth, is a species of geometrid moth in the family Geometridae. It is found in North America. The MONA or Hodges number for Mesoleuca gratulata is 7308. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Redwood National Park | 🇺🇸 United States | |
| 2 | Olympic National Park | 🇺🇸 United States | |
| 3 | Great Bear Rainforest | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Western White-Ribboned Carpet sighting in Great Bear Rainforest on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 137th most-seen of the 235 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.
March and April
In those months about 20% of wildlife watchers report a Western White-Ribboned Carpet in Great Bear Rainforest on a given day, against under 5% in June to February, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Western White-Ribboned Carpet sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 parks where we can rate Western White-Ribboned Carpet sightings, Great Bear Rainforest ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Redwood National Park (United States, about 10%) and Olympic National Park (United States, about 10%).
Same family: Geometridae
The closest relatives of the Western White-Ribboned Carpet that you can see in Great Bear Rainforest (family Geometridae, Geometer Moths) are Variable Carpet Moth (about 10%), Peppered Moth (about 10%) and Western Carpet (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Western White-Ribboned Carpet is recorded against all the insects logged in Great Bear Rainforest (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.
