Phytomyza ilicicola
In 3 days ~10% in a week ~30%
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 |
With luck
About 10% of wildlife watchers report an American Holly Leafminer sighting in Washington on a given day, based on 180 verified sightings from GBIF citizen-science data. It is the 225th 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 30%, if each day is a fresh chance.
November to April
In those months about 10% of wildlife watchers report an American Holly Leafminer in Washington on a given day, against under 5% in May to October, 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.
Yes
Of the 5 cities where we can rate American Holly Leafminer sightings, Washington has the highest daily chance: about 10%. Next come New York City (United States, under 5%) and Philadelphia (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 Washington (180 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.
