Trichius gallicus
In 3 days ~20% in a week ~40%
Trichius gallicus is a beetle species belonging to the family Scarabaeidae, subfamily Cetoniinae. It frequently appears in the literature under the name "Trichius rosaceus", but this name is permanently unavailable under ICZN Article 11.4, as are all of Voet's names.
These beetles are present in most of Europe, they are about 10 millimeters long and can be encountered from May through July feeding on flowers. The sides of the chest and the back of the abdomen are covered with a pubescence, hence the popular name of Bee beetle of Trichius species. Head and pronotum are black, while the elytra are yellowish, crossed by a few black bands.
The first black band usually does not reach the scutellum, other bands are incomplete and the second has a rectangular form. The color of hair usually is more orange-red compared to Trichius fasciatus. Median tibiae are without teeth. In males, only the penultimate abdominal segment has a band of white hairs. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Monfragüe National Park | 🇪🇸 Spain | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Pyrénées National Park | 🇫🇷 France |
With luck
About 10% of wildlife watchers report a French Flower Chafer sighting in Lyon on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 183rd most-seen of the 411 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.
May and June
In those months about 10% of wildlife watchers report a French Flower Chafer in Lyon on a given day, against under 5% in July to April, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most French Flower Chafer sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 8 cities where we can rate French Flower Chafer sightings, Lyon ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Berlin (Germany, about 10%).
Same family: Scarabaeidae
The closest relatives of the French Flower Chafer that you can see in Lyon (family Scarabaeidae, Scarabs) are Mediterranean Spotted Chafer (about 20%), European Rose Chafer (about 10%) and Valgus hemipterus (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the French Flower Chafer is recorded against all the insects logged in Lyon (13 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.
