Rabdophaga salicisbrassicoides
In 3 days ~10% in a week ~20%
Rabdophaga salicisbrassicoides, known generally as the willow rosette gall midge or willow cabbage gall midge, is a species of gall midges in the family Cecidomyiidae. Their galls and larvae thrive in association with the mutualistic relationship between Formica neoclara and Chaitophorus aphids found on their host species Salix exigua. The larva overwinter in their galls, and adults emerge in late April. 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 Willow Rosette Gall Midge sighting in San Francisco on a given day, based on 21 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 Willow Rosette 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 Willow Rosette 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 Willow Rosette Gall Midge is recorded against all the insects logged in San Francisco (21 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.
