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 Vienna on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 760th most-seen of the 1406 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.
December
In that month about 10% of wildlife watchers report a Valerian Psyllid in Vienna on a given day, against under 5% in January to November, the lowest months.
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.
4th of 5
Of the 5 cities where we can rate Valerian Psyllid sightings, Vienna ranks 4th 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 Vienna (13 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.
