Agrilus bilineatus
In 3 days ~10% in a week ~20%
Agrilus bilineatus, the two-lined chestnut borer, is a species of metallic wood-boring beetle in the family Buprestidae. It is native to North America, and has been introduced to Turkey. It is known for its two white lines in the elytra, it bores into chestnut, but also bores into oak 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 | Washington | 🇺🇸 United States | |
| 3 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Two-Lined Chestnut Borer 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 Two-Lined Chestnut Borer in Boston on a given day, so our monthly data shows no clear season.
Yes
Of the 3 cities where we can rate Two-Lined Chestnut Borer sightings, Boston has the highest daily chance: under 5%. Next come Washington (United States, under 5%) and New York City (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Two-Lined Chestnut Borer 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.
