Trioza centranthi
In 3 days ~10% in a week ~30%
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 Leeds on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 230th most-seen of the 284 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
February–March, May, September and November
In those months about 10% of wildlife watchers report a Valerian Psyllid in Leeds on a given day, against under 5% in April, June–August, October and December–January, 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.
3rd of 5
Of the 5 cities where we can rate Valerian Psyllid sightings, Leeds ranks 3rd at under 5%. The best odds are in London (United Kingdom, about 10%) and Liverpool (United Kingdom, about 10%).
Same order: Hemiptera
The closest relatives of the Valerian Psyllid that you can see in Leeds (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Green Shield Bug (about 30%), Forest Bug (about 20%) and Hawthorn Shield Bug (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Valerian Psyllid is recorded against all the insects logged in Leeds (8 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.
