Asphondylia photiniae
In 3 days ~10% in a week ~20%
Asphondylia photiniae, also known as the toyon fruit gall midge or toyon berry gall midge, is a species of midge that induces galls on the developing berries of the toyon bush in North America. Galled berries stay green (when other fruit has ripened to red or gold, etc.) and look somewhat warped. Each galled berry contains a single larva, which emerges in spring. This midge is known from the Californias, where native Heteromeles arbutifolia grows in relative abundance. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Francisco | 🇺🇸 United States | |
| 2 | Los Angeles | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Toyon Fruit Gall Midge sighting in San Francisco on a given day, based on 19 verified sightings from GBIF citizen-science data. It is the 362nd most-seen of the 737 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Toyon Fruit Gall Midge in San Francisco on a given day, so our monthly data shows no clear season.
Yes
Of the 2 cities where we can rate Toyon Fruit Gall Midge sightings, San Francisco has the highest daily chance: under 5%. Next come Los Angeles (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Toyon Fruit Gall Midge is recorded against all the insects logged in San Francisco (19 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.
