Arenopsaltria fullo
In 3 days ~10% in a week ~30%
Arenopsaltria fullo, also known as the sandgrinder, is a species of cicada in the true cicada family. It is endemic to Australia. It was described in 1850 by English entomologist Francis Walker. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Perth | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report a Western Sandgrinder sighting in Perth on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 143rd most-seen of the 275 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.
December to February
In those months about 10% of wildlife watchers report a Western Sandgrinder in Perth on a given day, against under 5% in March to November, the lowest months. Those are among Perth's driest months, with about 15 mm of rain a month against 130 mm in July.
Only Perth, in our data
Perth is the only city on Wallace's Line with enough records to rate Western Sandgrinder sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Western Sandgrinder is recorded against all the insects logged in Perth (12 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.
