Gryllus campestris
In 3 days ~10% in a week ~30%
Gryllus campestris, the European field cricket or simply the field cricket in the British Isles, is the type species of crickets in its genus and tribe Gryllini. These flightless dark colored insects are comparatively large; the males range from 19 to 23 mm and the females from 17 to 22 mm.
Gryllus campestris used to be common over most of Western Europe. It prefers dry, sunny locations with short vegetation, like dry grasslands. At the northern edge of its range, it is restricted to heathlands and oligotrophic grasslands. The species is flightless and unable to migrate long distances, and it therefore does not commonly recover on its own from local extinction.
The reproductive season of the univoltine species lasts from May to July. The males make a burrow with a platform at the entrance from which they attract females with their courtship stridulation. They chirp during daytime as well as the first part of the night, only when the temperature is well above 13 °C (55 °F).
Nymphs hatch in June till mid July and hibernate during their tenth or eleventh instar. The final moult takes place at the end of April or at the beginning of May. Males are territorial... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Biebrza National Park | 🇵🇱 Poland | |
| 2 | Triglav National Park | 🇸🇮 Slovenia | |
| 3 | Białowieża National Park | 🇵🇱 Poland | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 5 | Cévennes National Park | 🇫🇷 France | |
| 6 | Pyrénées National Park | 🇫🇷 France | |
| 7 | Aigüestortes National Park | 🇪🇸 Spain | |
| 8 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 9 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
Rare
Under 5% of wildlife watchers report a European Field Cricket sighting in Porto on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 290th most-seen of the 498 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May and August–September
In those months about 10% of wildlife watchers report a European Field Cricket in Porto on a given day, against under 5% in June–July and October–April, the lowest months. Those are among Porto's driest months, with about 45 mm of rain a month against 140 mm in January.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most European Field Cricket sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 6
Of the 6 cities where we can rate European Field Cricket sightings, Porto ranks 3rd at under 5%. The best odds are in Milan (Italy, about 10%) and Vienna (Austria, about 10%).
GBIF citizen-science records
It is estimated from how often the European Field Cricket is recorded against all the insects logged in Porto (14 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.
