Pemphigus populitransversus
In 3 days ~10% in a week ~20%
Pemphigus populitransversus also known as poplar petiole gall aphid or cabbage root aphid, induces galls on the leaves of poplar trees. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Chicago | 🇺🇸 United States | |
| 3 | New York City | 🇺🇸 United States | |
| 4 | Washington | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Poplar Petiole Gall Aphid sighting in Boston on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 967th most-seen of the 1200 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 Poplar Petiole Gall Aphid in Boston on a given day, so our monthly data shows no clear season.
Yes
Of the 4 cities where we can rate Poplar Petiole Gall Aphid sightings, Boston has the highest daily chance: under 5%. Next come Chicago (United States, under 5%) and New York City (United States, under 5%).
Same family: Aphididae
The closest relatives of the Poplar Petiole Gall Aphid that you can see in Boston (family Aphididae, Aphids) are Oleander Aphid (about 20%), Witch-Hazel Cone Gall Aphid (about 10%) and Spiny Witch-Hazel Gall Aphid (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Poplar Petiole Gall Aphid is recorded against all the insects logged in Boston (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.
