Pachypsylla celtidismamma
In 3 days ~20% in a week ~40%
Pachypsylla celtidismamma, known generally as the hackberry nipplegall maker or hackberry psylla, is a species of plant-parasitic hemipteran in the family Aphalaridae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | Chicago | 🇺🇸 United States | |
| 4 | Montreal | 🇨🇦 Canada | |
| 5 | Detroit | 🇺🇸 United States | |
| 6 | Boston | 🇺🇸 United States | |
| 7 | Denver | 🇺🇸 United States | |
| 8 | New York City | 🇺🇸 United States | |
| 9 | Toronto | 🇨🇦 Canada | |
| 10 | Philadelphia | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Hackberry Nipplegall Psyllid sighting in Montreal on a given day, based on 169 verified sightings from GBIF citizen-science data. It is the 68th most-seen of the 926 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
October
In that month about 20% of wildlife watchers report a Hackberry Nipplegall Psyllid in Montreal on a given day, against under 5% in January to May, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Hackberry Nipplegall Psyllid sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 16 cities where we can rate Hackberry Nipplegall Psyllid sightings, Montreal ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Minneapolis [Saint Paul] (United States, about 10%), Dallas (United States, about 10%) and Chicago (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Hackberry Nipplegall Psyllid is recorded against all the insects logged in Montreal (169 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.
