Psylla alni
In 3 days ~10% in a week ~20%
Psylla alni is a species of psyllid, a plant-feeding hemipteran in the family Psyllidae. It is the type species of Psylla, which is the type genus in its family. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland |
Rare
Under 5% of wildlife watchers report an Alder Sucker sighting in Helsinki on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 665th most-seen of the 838 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 an Alder Sucker in Helsinki on a given day, so our monthly data shows no clear season.
Only Helsinki, in our data
Helsinki is the only city on Wallace's Line with enough records to rate Alder Sucker sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Hemiptera
The closest relatives of the Alder Sucker that you can see in Helsinki (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Sloe Bug (about 20%), Birch Catkin Bug (about 20%) and European Striped Shield Bug (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Alder Sucker is recorded against all the insects logged in Helsinki (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.
