Cacoxenus indagator
In 3 days ~10% in a week ~30%
Cacoxenus indagator is a species of fruit fly native to central and southern Europe. It is a kleptoparasite, laying its eggs in the pollen-filled nest cells of mason bees. On account of its ability to break out of those cells once hatched, it is commonly known as the Houdini fly. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Houdini Fly sighting in Berlin on a given day, based on 15 verified sightings from GBIF citizen-science data. It is the 497th most-seen of the 1065 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.
February and April
In those months about 10% of wildlife watchers report a Houdini Fly in Berlin on a given day, against under 5% in March and May–January, the lowest months.
Yes
Of the 6 cities where we can rate Houdini Fly sightings, Berlin has the highest daily chance: under 5%. Next come Portland (United States, under 5%) and Vienna (Austria, under 5%).
GBIF citizen-science records
It is estimated from how often the Houdini Fly is recorded against all the insects logged in Berlin (15 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.
