Pemphigus obesinymphae
In 3 days ~10%
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 San Diego on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 632nd most-seen of the 693 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Cherubic Poplar Petiole-Gall Aphid in San Diego on a given day, so our monthly data shows no clear season.
Among the best
Of the 4 cities where we can rate Cherubic Poplar Petiole-Gall Aphid sightings, San Diego ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Sacramento (United States, under 5%), 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 San Diego (5 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.
