Acrobasis tricolorella
In 3 days ~10% in a week ~20%
Acrobasis tricolorella, the destructive prune worm or tricolored acrobasis moth, is a species of snout moth in the genus Acrobasis. It was described by Augustus Radcliffe Grote in 1878, and is known from southern Canada and northern United States.
Adults are on wing from June to October. The larvae feed on Prunus, Malus pumila, Prunus armeniaca, Sorbus americana, Rosa, Amelanchier and Heteromeles arbutifolia. They feed on buds and fruits of their host plant. The larvae engage in leaf rolling behavior. The species overwinters in the larval stage. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | Portland | 🇺🇸 United States | |
| 3 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Tricolored Acrobasis Moth sighting in Sacramento on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 350th most-seen of the 386 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.
August and October
In those months about 10% of wildlife watchers report a Tricolored Acrobasis Moth in Sacramento on a given day, against under 5% in September and November–July, the lowest months. Those are among Sacramento's driest months, with about 15 mm of rain a month against 120 mm in December.
Yes
Of the 3 cities where we can rate Tricolored Acrobasis Moth sightings, Sacramento has the highest daily chance: under 5%. Next come Portland (United States, under 5%) and San Francisco (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Tricolored Acrobasis Moth is recorded against all the insects logged in Sacramento (5 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.
