Methana marginalis
In 3 days ~10% in a week ~30%
Methana marginalis, also known as the common methana and the bush cockroach, is a species of cockroach native to the Queensland coast of Australia. The species was first described as Periplaneta marginalis by Henri Louis Frédéric de Saussure in 1864. The species was introduced to Norfolk Island in the mid-to-late 20th century, first seen in New Zealand in the 2020s, and in the 21st century has increasingly been seen in the southeastern Australia.
Methana marginalis is a relatively large cockroach species, with adult specimens measuring approximately 27–28.5 mm (1.06–1.12 in). It is dark brown in colour, with a light yellow band around the edge of its body, yellow-brown coloured legs, and tegmen completely covering the abdomen.
Methana marginalis was first described by Henri Louis Frédéric de Saussure in 1864, who named the species Periplaneta marginalis, based on specimens that had been collected from Australia in 1845 and 1846. William Forsell Kirby placed the species within the genus Methana in 1904.
The species is commonly found in coastal Queensland, Australia, including K'gari / Fraser Island, and since the mid-2000s... 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 Common Methana sighting in Sydney on a given day, based on 39 verified sightings from GBIF citizen-science data. It is the 212th 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 30%, if each day is a fresh chance.
July and December
In those months about 10% of wildlife watchers report a Common Methana in Sydney on a given day, against under 5% in January–June and August–November, the lowest months.
Yes
Of the 2 cities where we can rate Common Methana sightings, Sydney has the highest daily chance: under 5%. Next come Brisbane (Australia, under 5%).
GBIF citizen-science records
It is estimated from how often the Common Methana is recorded against all the insects logged in Sydney (39 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.
