Ellipsidion humerale
In 3 days ~10% in a week ~20%
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.
Rare
Under 5% of wildlife watchers report a Bush Cockroach sighting in Sydney on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 377th most-seen of the 742 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.
November
In that month about 10% of wildlife watchers report a Bush Cockroach in Sydney on a given day, against under 5% in December to October, the lowest months.
3rd of 4
Of the 4 cities where we can rate Bush Cockroach sightings, Sydney ranks 3rd at under 5%. The best odds are in Perth (Australia, about 10%) and Brisbane (Australia, under 5%).
GBIF citizen-science records
It is estimated from how often the Bush Cockroach is recorded against all the insects logged in Sydney (18 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.
