Phasia hemiptera
In 3 days ~20% in a week ~40%
Phasia hemiptera is a fly belonging to the family Tachinidae. British Isles, Czech Republic, Estonia, Hungary, Latvia, Moldova, Poland, Romania, Slovakia, Ukraine, Denmark, Finland, Norway, Sweden, Bosnia and Herzegovina, Bulgaria, Croatia, Greece, Italy, Serbia, Slovenia, Spain, Turkey, Austria, Belgium, France, Germany, Netherlands, Switzerland, Japan, North Korea, South Korea, Iran, Russia, China, Transcaucasia.
Phasia hemiptera can reach a body length of 10–11 millimetres (0.39–0.43 in). In these flies the thorax is usually dark brown, the middle of the very flattened abdomen is dark brown or black, while the sides are hairy orange-brown. The hind legs are generally reddish yellow. These flies are strongly sexually dimorphic. The males are more colourful and have broad curved patterned wings with markings of various colors. Sometimes wings show an iridescent blue-black band starting from the front edge, but they may also be or completely dark. Females have narrower and more transparent wings without markings, also their bodies are narrower.
Adults are visible from April to September feeding on pollen of many flowering plants,... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 3 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a Phasia hemiptera sighting in Bavarian Forest National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 471st most-seen of the 1115 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
April and July–August
In those months about 10% of wildlife watchers report a Phasia hemiptera in Bavarian Forest National Park on a given day, against under 5% in May–June and September–March, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Phasia hemiptera sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 parks where we can rate Phasia hemiptera sightings, Bavarian Forest National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Cairngorms National Park (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Phasia hemiptera is recorded against all the insects logged in Bavarian Forest National Park (12 verified sightings from 2019 to 2026), 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.
