Pachypsylla venusta
In 3 days ~30% in a week ~60%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Zion National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Dallas | 🇺🇸 United States | |
| 2 | Austin | 🇺🇸 United States | |
| 3 | San Antonio | 🇺🇸 United States | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | Washington | 🇺🇸 United States | |
| 6 | Chicago | 🇺🇸 United States | |
| 7 | New York City | 🇺🇸 United States | |
| 8 | Philadelphia | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Hackberry Petiole Gall Psyllid sighting in Zion National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 35th most-seen of the 114 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
May, September and December
In those months about 20% of wildlife watchers report a Hackberry Petiole Gall Psyllid in Zion National Park on a given day, against under 5% in January–February, April and October, the lowest months.
Between 4 and 7 pm
Across all the parks we cover, that three-hour window holds the most Hackberry Petiole Gall Psyllid sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Hackberry Petiole Gall Psyllid sightings, Zion National Park has the highest daily chance: about 10%. Next come Shenandoah National Park (United States, under 5%).
Same order: Hemiptera
The closest relatives of the Hackberry Petiole Gall Psyllid that you can see in Zion National Park (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Eastern Boxelder Bug (about 40%), North American Common Water Strider (about 30%) and Giant Agave Bug (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hackberry Petiole Gall Psyllid is recorded against all the insects logged in Zion National Park (15 verified sightings from 2019 to 2026), 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.
