Serica brunnea
In 3 days ~20% in a week ~40%
Serica brunnea, the brown chafer, is a species of beetle of the family Scarabaeidae. It is found in Albania, Austria, Belarus, Belgium, Bosnia Herzegovina, Bulgaria, China (Xinjiang), Croatia, the Czech Republic, Denmark, Finland, France, Germany, Great Britain, Hungary, Ireland, Italy, Kazakhstan, Latvia, Lichtenstein, Lithuania, Luxembourg, North Macedonia, Moldova, Mongolia, the Netherlands, Norway, Poland, Romania, Russia, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland and Ukraine. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vanoise National Park | 🇫🇷 France | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany | |
| 3 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 5 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Hamburg | 🇩🇪 Germany | |
| 3 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 4 | Essen | 🇩🇪 Germany | |
| 5 | Copenhagen | 🇩🇰 Denmark | |
| 6 | Berlin | 🇩🇪 Germany | |
| 7 | Amsterdam | 🇳🇱 Netherlands | |
| 8 | Warsaw | 🇵🇱 Poland | |
| 9 | Minsk | 🇧🇾 Belarus | |
| 10 | Stockholm | 🇸🇪 Sweden |
With luck
About 10% of wildlife watchers report a Brown Chafer sighting in Amsterdam on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 120th most-seen of the 234 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.
June
In that month about 20% of wildlife watchers report a Brown Chafer in Amsterdam on a given day, against under 5% in August to May, the lowest months.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Brown Chafer sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Among the best
Of the 15 cities where we can rate Brown Chafer sightings, Amsterdam ranks 7th at about 10%, level with the leaders once rounded. The best odds are in Helsinki (Finland, about 10%), Hamburg (Germany, about 10%) and Rotterdam [The Hague] (Netherlands, about 10%).
Same family: Scarabaeidae
The closest relatives of the Brown Chafer that you can see in Amsterdam (family Scarabaeidae, Scarabs) are Garden Chafer (about 10%), Valgus hemipterus (about 10%) and Mimela junii (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Brown Chafer is recorded against all the insects logged in Amsterdam (9 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.
