Ectobius pallidus
In 3 days ~20% in a week ~50%
Ectobius pallidus, the tawny cockroach, is a species of non-cosmopolitan cockroach in the family Ectobiidae. It occurs in southern England, Belgium, France, the Netherlands, Germany, Switzerland, Italy, Spain and Portugal; in North Africa: Algeria and Tunisia. It is now known to be introduced into North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Acadia National Park | 🇺🇸 United States | |
| 4 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | New York City | 🇺🇸 United States | |
| 3 | Paris | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Tawny Cockroach sighting in Boston on a given day, based on 144 verified sightings from GBIF citizen-science data. It is the 117th most-seen of the 1200 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
June to September
In those months about 10% of wildlife watchers report a Tawny Cockroach in Boston on a given day, against under 5% in October to May, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Tawny Cockroach sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Yes
Of the 3 cities where we can rate Tawny Cockroach sightings, Boston has the highest daily chance: about 10%. Next come New York City (United States, under 5%) and Paris (France, under 5%).
GBIF citizen-science records
It is estimated from how often the Tawny Cockroach is recorded against all the insects logged in Boston (144 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.
