Pachypsylla celtidisvesicula
In 3 days ~10% in a week ~20%
Pachypsylla celtidisvesicula, commonly called the hackberry blistergall psyllid, is a species of aphalarid psyllid found in North America. The nymphs of this species induce blister-like galls on the leaves of various hackberries (Celtis spp.) throughout its range.
It closely related to the more common hackberry nipplegall psyllid (Pachypsylla celtidismamma), which it strongly resembles as an adult. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | Austin | 🇺🇸 United States | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | Montreal | 🇨🇦 Canada | |
| 6 | Chicago | 🇺🇸 United States | |
| 7 | Boston | 🇺🇸 United States | |
| 8 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Hackberry Blister Gall Psyllid sighting in Montreal on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 599th most-seen of the 926 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 Hackberry Blister Gall Psyllid in Montreal on a given day, so our monthly data shows no clear season.
5th of 8
Of the 8 cities where we can rate Hackberry Blister Gall Psyllid sightings, Montreal ranks 5th at under 5%. The best odds are in Minneapolis [Saint Paul] (United States, about 10%), Dallas (United States, under 5%) and Austin (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Hackberry Blister Gall Psyllid is recorded against all the insects logged in Montreal (10 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.
