Chrysops relictus
In 3 days ~10% in a week ~20%
Chrysops relictus, the twin-lobed deerfly, is a largish European and Asian deerfly of about 8–10.5 millimetres (0.31–0.41 in) length. The larvae feed upon organic matter in damp soils, and are termed hydrobionts in that they inhabit areas of high water content. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wadden Sea National Park | 🇩🇪 Germany | |
| 2 | Pyrénées National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a Twin-Lobed Deer Fly sighting in Pyrénées National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 940th most-seen of the 1277 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.
June
In that month about 10% of wildlife watchers report a Twin-Lobed Deer Fly in Pyrénées National Park on a given day, against under 5% in July to May, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Twin-Lobed Deer Fly sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Twin-Lobed Deer Fly sightings, Pyrénées National Park ranks 2nd at under 5%. The best odds are in Wadden Sea National Park (Germany, about 10%).
GBIF citizen-science records
It is estimated from how often the Twin-Lobed Deer Fly is recorded against all the insects logged in Pyrénées National Park (7 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.
