Stethophyma grossum
In 3 days ~40% in a week ~70%
The large marsh grasshopper (Stethophyma grossum) is a species of grasshopper belonging to the family Acrididae. The large marsh grasshopper was first described in the 10th edition of Systema Naturae, which was written by Swedish biologist Carl Linnaeus in 1758. Linnaeus considered all orthopteran insects to be members of the genus Gryllus, and gave the scientific name Gryllus grossus to this species. Later authors split the orthopterans into multiple genera, and the large marsh grasshopper would therefore be reclassified. French zoologist Pierre André Latreille moved the species into Acrydium in 1804, renaming it as Acrydium grossum, while French entomologist Jean Guillaume Audinet-Serville assigned it to Oedipoda in 1839 under the name Oedipoda grossa, and German entomologist Franz Xaver Fieber considered it a member of Mecostethus which he renamed as Mecostethus grossus in 1853. Later that year, German zoologist Leopold Heinrich Fischer published a book reviewing the orthopterans of Europe in which he determines that the large marsh grasshopper cannot be assigned to any existing genus. He therefore established the genus Stethophyma, of which this species was designated... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Białowieża National Park | 🇵🇱 Poland | |
| 2 | Aigüestortes National Park | 🇪🇸 Spain | |
| 3 | Pyrénées National Park | 🇫🇷 France | |
| 4 | Mercantour National Park | 🇫🇷 France | |
| 5 | Ecrins National Park | 🇫🇷 France | |
| 6 | Cévennes National Park | 🇫🇷 France | |
| 7 | Bavarian Forest National Park | 🇩🇪 Germany |
Possible
About 20% of wildlife watchers report a Large Marsh Grasshopper sighting in Białowieża National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 62nd most-seen of the 158 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
August
In that month about 40% of wildlife watchers report a Large Marsh Grasshopper in Białowieża National Park on a given day, against under 5% in October to June, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Large Marsh Grasshopper sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 7 parks where we can rate Large Marsh Grasshopper sightings, Białowieża National Park has the highest daily chance: about 20%. Next come Aigüestortes National Park (Spain, about 20%) and Pyrénées National Park (France, about 10%).
Same family: Acrididae
The closest relatives of the Large Marsh Grasshopper that you can see in Białowieża National Park (family Acrididae, Short-horned Grasshoppers) are Meadow Grasshopper (about 20%), Blue-Winged Grasshopper (about 10%) and Common Green Grasshopper (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Large Marsh Grasshopper is recorded against all the insects logged in Białowieża National Park (14 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.
