Psylla buxi
In 3 days ~10%
Psylla buxi, known generally as the boxwood psyllid or box sucker, is a species of plant-parasitic hemipteran in the family Psyllidae. It is native to Europe and introduced to North America. The psyllid causes cabbage-like leaf clusters, known as galls at the tips of box shoots. The leaves are slightly thicker and strongly concave, and in the summer conceal many pale green nymphs, which are coated with white wax. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | New York City | 🇺🇸 United States | |
| 2 | Hamburg | 🇩🇪 Germany | |
| 3 | Vancouver | 🇨🇦 Canada | |
| 4 | Toronto | 🇨🇦 Canada | |
| 5 | Boston | 🇺🇸 United States | |
| 6 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Box Sucker sighting in San Francisco on a given day, based on 20 verified sightings from GBIF citizen-science data. It is the 373rd most-seen of the 737 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Box Sucker in San Francisco on a given day, so our monthly data shows no clear season.
6th of 6
Of the 6 cities where we can rate Box Sucker sightings, San Francisco ranks 6th at under 5%. The best odds are in New York City (United States, about 10%), Hamburg (Germany, under 5%) and Vancouver (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Box Sucker is recorded against all the insects logged in San Francisco (20 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.
