Drosophila testacea
In 3 days ~10% in a week ~20%
Drosophila testacea is a member of the testacea species group of Drosophila. Testacea species are specialist fruit flies that breed on the fruiting bodies of mushrooms. Drosophila testacea can be found in temperate regions of Europe, extending to East Asia. Drosophila testacea and Drosophila orientacea can produce viable hybrids, though they are separated by geography and behavioural barriers. Drosophila testacea females will also readily mate with Drosophila neotestacea males, but viable hybrids are never produced. This hybrid inviability (see Haldane's rule)) may be due to selfish X chromosomes and co-evolved suppressors. Alternately, differences in sex pheromone (e.g. vaccenyl acetate) reception could underlie female readiness and male willingness to copulate.
The antimicrobial peptide gene Diptericin B has been pseudogenized in D. testacea and likely its sister species, D. neotestacea. This was due to a lack of Acetobacter bacteria in its environment, relaxing Natural selection on Diptericin B, which is specifically evolved to combat Acetobacter. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vienna | 🇦🇹 Austria |
Rare
Under 5% of wildlife watchers report a Drosophila testacea sighting in Vienna on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 1286th most-seen of the 1406 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 Drosophila testacea in Vienna on a given day, against under 5% in December to October, the lowest months.
Only Vienna, in our data
Vienna is the only city on Wallace's Line with enough records to rate Drosophila testacea sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Drosophila testacea is recorded against all the insects logged in Vienna (5 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.
