Pemphigus obesinymphae
In 3 days ~10% in a week ~20%
Pemphigus obesinymphae is a species of gall-forming aphid. It creates galls on the leaves of Populus fremontii. The species is the only North American aphid known to have soldiers, first instar nymphs that defend the colony. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | San Francisco | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States | |
| 4 | San Diego | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Cherubic Poplar Petiole-Gall Aphid sighting in Sacramento on a given day, based on 10 verified sightings from GBIF citizen-science data. It is the 238th most-seen of the 386 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.
August and September
In those months about 10% of wildlife watchers report a Cherubic Poplar Petiole-Gall Aphid in Sacramento on a given day, against under 5% in October to July, the lowest months. Those are among Sacramento's driest months, with almost no rain against 120 mm in December.
Yes
Of the 4 cities where we can rate Cherubic Poplar Petiole-Gall Aphid sightings, Sacramento has the highest daily chance: under 5%. Next come San Francisco (United States, under 5%) and Los Angeles (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Cherubic Poplar Petiole-Gall Aphid is recorded against all the insects logged in Sacramento (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.
