Phytomyza ilicicola
In 3 days ~10% in a week ~20%
Phytomyza ilicicola, the native holly leafminer, is a species of leaf miner fly in the family Agromyzidae. They are a pest of the American holly. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | New York City | 🇺🇸 United States | |
| 3 | Philadelphia | 🇺🇸 United States | |
| 4 | Baltimore | 🇺🇸 United States | |
| 5 | Boston | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an American Holly Leafminer sighting in Philadelphia on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 432nd most-seen of the 632 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.
January–February and April
In those months about 10% of wildlife watchers report an American Holly Leafminer in Philadelphia on a given day, against under 5% in March and May–December, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most American Holly Leafminer sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 5
Of the 5 cities where we can rate American Holly Leafminer sightings, Philadelphia ranks 3rd at under 5%. The best odds are in Washington (United States, about 10%) and New York City (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the American Holly Leafminer is recorded against all the insects logged in Philadelphia (11 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.
