Trioza centranthi
In 3 days ~10% in a week ~20%
Trioza centranthi is a sap-sucking hemipteran bug in the family Triozidae which creates galls on the leaves and flowers of Centranthus and Valerianella species. It was first described by Jean Nicolas Vallot, a French entomologist in 1829 and is found in Europe. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Valerian Psyllid sighting in Paris on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 827th most-seen of the 916 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 Valerian Psyllid in Paris on a given day, so our monthly data shows no clear season.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Valerian Psyllid sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
5th of 5
Of the 5 cities where we can rate Valerian Psyllid sightings, Paris ranks 5th at under 5%. The best odds are in London (United Kingdom, about 10%), Liverpool (United Kingdom, about 10%) and Leeds (United Kingdom, under 5%).
GBIF citizen-science records
It is estimated from how often the Valerian Psyllid is recorded against all the insects logged in Paris (6 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.
