Ellipsidion humerale
In 3 days ~30% in a week ~50%
Ellipsidion humerale, or common ellipsidion or bush cockroach, is a harmless species of cockroach native to northern parts of Australia and also found in the vicinity of Perth, Western Australia and Brisbane, Queensland. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Bush Cockroach sighting in Perth on a given day, based on 47 verified sightings from GBIF citizen-science data. It is the 44th most-seen of the 275 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
October to December
In those months about 20% of wildlife watchers report a Bush Cockroach in Perth on a given day, against under 5% in March to August, the lowest months. Those are among Perth's driest months, with about 25 mm of rain a month against 130 mm in July.
Yes
Of the 4 cities where we can rate Bush Cockroach sightings, Perth has the highest daily chance: about 10%. Next come Brisbane (Australia, under 5%) and Sydney (Australia, under 5%).
GBIF citizen-science records
It is estimated from how often the Bush Cockroach is recorded against all the insects logged in Perth (47 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.
