Syromastus rhombeus
In 3 days ~20% in a week ~40%
Syromastus rhombeus, sometimes called the "rhombic leatherbug" is a species of European bugs in the family Coreidae, tribe Coreini. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mercantour National Park | 🇫🇷 France | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
With luck
About 10% of wildlife watchers report a Rhombic Leatherbug sighting in Sierra de Guadarrama National Park on a given day, based on 17 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 197th most-seen of the 597 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.
March–July and November
In those months about 10% of wildlife watchers report a Rhombic Leatherbug in Sierra de Guadarrama National Park on a given day, against under 5% in August–October and December–February, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Rhombic Leatherbug sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 parks where we can rate Rhombic Leatherbug sightings, Sierra de Guadarrama National Park ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Mercantour National Park (France, about 10%) and Cévennes National Park (France, about 10%).
Same family: Coreidae
The closest relatives of the Rhombic Leatherbug that you can see in Sierra de Guadarrama National Park (family Coreidae, Leaf-footed Bugs) are Western Conifer Seed Bug (about 10%), Dock Bug (about 10%) and Boat Bug (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rhombic Leatherbug is recorded against all the insects logged in Sierra de Guadarrama National Park (17 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.
