Roeseliana roeselii
In 3 days ~50% in a week ~80%
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 |
Possible
About 20% of wildlife watchers report a Roesel's Bush-Cricket sighting in Mercantour National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 111th most-seen of the 412 insects we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
October
In that month about 40% of wildlife watchers report a Roesel's Bush-Cricket in Mercantour National Park on a given day, against under 5% in September and November–May, the lowest months. That is one of Mercantour National Park's wettest months, with about 140 mm of rain against 50 mm in August.
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.
Among the best
Of the 11 parks where we can rate Roesel's Bush-Cricket sightings, Mercantour National Park ranks 2nd at about 20%, level with the leaders once rounded. The best odds are in Tatra National Park (Slovakia, about 20%).
Same family: Tettigoniidae
The closest relatives of the Roesel's Bush-Cricket that you can see in Mercantour National Park (family Tettigoniidae, Katydids) are Wart-Biter (about 50%), Alpine Saddle-Backed Bush-Cricket (about 50%) and Ghiliani's Alpine Bush-Cricket (about 30%), 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 Mercantour National Park (20 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.
