Bibio hortulanus
In 3 days ~10% in a week ~20%
Bibio hortulanus, common name marchfly, is a species of fly from the family Bibionidae. This species is present in most of Europe (Austria, Belgium, British Islands, Czech Republic, Denmark, France, Germany, Greece, Italy, Latvia, Liechtenstein, Norway, Poland, Portugal, Slovakia, Spain, Sweden and Switzerland), in North Africa and in the Middle East.
These flies mainly inhabit woodland margins, meadows, flowering crops and hedgerows. Bibio hortulanus can reach a body length of about 6.5–8.5 millimetres (0.26–0.33 in). Wing length is of about 9.5 mm. This species has an evident sexual dimorphism. The body of males is completely black and slightly smaller than the female. The thorax is covered by black hairs, with gray hairs on the sides of breast and abdomen. Head, proboscis and palpi are blackish-brown, whereas legs and halteres are black. The eyes are enormous and contiguous, while in the females they are smaller and clearly separated. The short and robust antennae are inserted under the eyes. Wings are transparent or whitish, but brownish along the costa.
In the females the dorsal surface of the thorax and the abdomen is orange-red... 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 Garden March Fly sighting in Vienna on a given day, based on 22 verified sightings from GBIF citizen-science data. It is the 599th 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.
April
In that month about 10% of wildlife watchers report a Garden March Fly in Vienna on a given day, against under 5% in May to March, the lowest months.
5th of 6
Of the 6 cities where we can rate Garden March Fly sightings, Vienna ranks 5th at under 5%. The best odds are in Jerusalem (Israel, about 10%), Tel Aviv (Israel, about 10%) and Athens (Greece, about 10%).
GBIF citizen-science records
It is estimated from how often the Garden March Fly is recorded against all the insects logged in Vienna (22 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.
