Hackberry Petiole Gall Psyllid

Hackberry Petiole Gall Psyllid

Pachypsylla venusta

Endemic
Daily sighting probability <5% · Rare
at Washington

In 3 days ~10% in a week ~20%

72 Verified sightings at Washington
24 In all 2 parks From 2019 to 2026
April Best month
☀️ Diurnal When it's spotted

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Zion National Park 🇺🇸 United States
~10%
2 Shenandoah National Park 🇺🇸 United States
<5%

Cities Where Found

# City Country Daily sighting probability
1 Dallas 🇺🇸 United States
~10%
2 Austin 🇺🇸 United States
~10%
3 San Antonio 🇺🇸 United States
~10%
4 Houston 🇺🇸 United States
~10%
5 Washington 🇺🇸 United States
<5%
6 Chicago 🇺🇸 United States
<5%
7 New York City 🇺🇸 United States
<5%
8 Philadelphia 🇺🇸 United States
<5%

Before you go

What are the chances of seeing a Hackberry Petiole Gall Psyllid in Washington?

Rare

Under 5% of wildlife watchers report a Hackberry Petiole Gall Psyllid sighting in Washington on a given day, based on 72 verified sightings from GBIF citizen-science data. It is the 374th most-seen of the 1807 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.

When is the best time to see a Hackberry Petiole Gall Psyllid in Washington?

April and May

In those months about 10% of wildlife watchers report a Hackberry Petiole Gall Psyllid in Washington on a given day, against under 5% in June to March, the lowest months.

What time of day is best to see a Hackberry Petiole Gall Psyllid?

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.

Is Washington the best place to see a Hackberry Petiole Gall Psyllid?

5th of 8

Of the 8 cities where we can rate Hackberry Petiole Gall Psyllid sightings, Washington ranks 5th at under 5%. The best odds are in Dallas (United States, about 10%), Austin (United States, about 10%) and San Antonio (United States, about 10%).

Where does the Hackberry Petiole Gall Psyllid sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Hackberry Petiole Gall Psyllid is recorded against all the insects logged in Washington (72 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.

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