Marmara arbutiella
In 3 days ~10% in a week ~30%
Marmara arbutiella is a moth of the family Gracillariidae. It is known from Canada and the United States (Oregon, Washington and California). The larvae feed on Arbutus menziesii, Arbutus unedo and Arctostaphylos species. They mine the leaves of their host plant. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Bear Rainforest | 🇨🇦 Canada | |
| 2 | Olympic National Park | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Madrone Skin Miner sighting in Portland on a given day, based on 42 verified sightings from GBIF citizen-science data. It is the 186th most-seen of the 507 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
November to April
In those months about 10% of wildlife watchers report a Madrone Skin Miner in Portland on a given day, against under 5% in May to October, the lowest months. Those are among Portland's wettest months, with about 190 mm of rain a month against 10 mm in July.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Madrone Skin Miner sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 3
Of the 3 cities where we can rate Madrone Skin Miner sightings, Portland ranks 2nd at under 5%. The best odds are in Seattle (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Madrone Skin Miner is recorded against all the insects logged in Portland (42 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.
