Roeseliana roeselii
In 3 days ~30% in a week ~50%
Roesel's bush-cricket (Roeseliana roeselii) (synonym Metrioptera roeselii) is a European bush-cricket, named after August Johann Rösel von Rosenhof, a German entomologist. Adult Roesel's bush-crickets are medium-sized Tettigoniid between 13–26 mm in length. They are normally brown or yellow, often with a greenish shade and a rarer green form also sometimes occurs. An identifying feature is the yellow-green spots along the abdomen, just behind the pronotum, along with a matching margin along the border of the pronotum. This margin is entire, unlike the bog bush-cricket.
Males and females can be easily differentiated, as the females have a long sword-like ovipositor at the end of their abdomen, which the males lack. Both male and female adults are normally brachypterous. However, a macropterous form, f. diluta (described by Charpentier 1825) also exists. These have much longer wings, and usually make up less than 1% of the total population, but in some populations occur in much higher numbers, usually in areas where the bush-cricket's range has recently expanded to.
They are more common in long, warm summers where populations... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tatra National Park | 🇸🇰 Slovakia | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Elk Island National Park | 🇨🇦 Canada | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 5 | Aigüestortes National Park | 🇪🇸 Spain | |
| 6 | Triglav National Park | 🇸🇮 Slovenia | |
| 7 | Białowieża National Park | 🇵🇱 Poland | |
| 8 | Pyrénées National Park | 🇫🇷 France | |
| 9 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 10 | Wadden Sea National Park | 🇩🇪 Germany | |
| 11 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Birmingham | 🇬🇧 United Kingdom | |
| 2 | London | 🇬🇧 United Kingdom | |
| 3 | Warsaw | 🇵🇱 Poland | |
| 4 | Helsinki | 🇫🇮 Finland | |
| 5 | Manchester | 🇬🇧 United Kingdom | |
| 6 | Kharkiv | 🇺🇦 Ukraine | |
| 7 | Hamburg | 🇩🇪 Germany | |
| 8 | Berlin | 🇩🇪 Germany | |
| 9 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 10 | Liverpool | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report a Roesel's Bush-Cricket sighting in Białowieża National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 131st most-seen of the 158 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
July to September
In those months about 20% of wildlife watchers report a Roesel's Bush-Cricket in Białowieża National Park on a given day, against under 5% in October to June, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Roesel's Bush-Cricket sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
7th of 11
Of the 11 parks where we can rate Roesel's Bush-Cricket sightings, Białowieża National Park ranks 7th at about 10%. The best odds are in Tatra National Park (Slovakia, about 20%), Mercantour National Park (France, about 20%) and Elk Island National Park (Canada, about 20%).
Same family: Tettigoniidae
The closest relatives of the Roesel's Bush-Cricket that you can see in Białowieża National Park (family Tettigoniidae, Katydids) are Dark Bush-Cricket (about 20%), Upland Green Bush-Cricket (about 20%) and Long-Winged Conehead (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Roesel's Bush-Cricket is recorded against all the insects logged in Białowieża National Park (5 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.
