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 |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Bush Cockroach sighting in Brisbane on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 575th most-seen of the 1083 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.
February and December
In those months about 10% of wildlife watchers report a Bush Cockroach in Brisbane on a given day, against under 5% in January and March–November, the lowest months. Those are among Brisbane's wettest months, with about 140 mm of rain a month against 40 mm in July.
2nd of 4
Of the 4 cities where we can rate Bush Cockroach sightings, Brisbane ranks 2nd at under 5%. The best odds are in Perth (Australia, about 10%).
GBIF citizen-science records
It is estimated from how often the Bush Cockroach is recorded against all the insects logged in Brisbane (14 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.
