Apodemus sylvaticus
Silhouette: Anthony Caravaggi · PhyloPic
In 3 days ~10% in a week ~30%
The wood mouse (Apodemus sylvaticus) is a murid rodent native to Europe and northwestern Africa. It is closely related to the yellow-necked mouse (A. flavicollis) but differs in that it has no band of yellow fur around the neck, has slightly smaller ears, and is usually slightly smaller overall: around 90 mm (3.54 in) in length and 23 g in weight. It is found across most of Europe and is a very common and widespread species, is commensal with people and is sometimes considered a pest. Other common names are long-tailed field mouse, field mouse, common field mouse, and European wood mouse. This species is a known potential carrier of the Dobrava sequence of hantavirus which affects humans and may pose serious risks to human health.
Wood mice inhabit forests, grasslands, and cultivated fields, tending to seek out more wooded areas in winter. Almost entirely nocturnal and terrestrial, wood mice burrow extensively, build nests of plants and live in buildings during harsh seasons. It is one of the most intensively studied species in the genus. In Europe, it ranges north to Scandinavia and east to Ukraine. The wood mouse is also found in northwestern Africa... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 3 | Pyrénées National Park | 🇫🇷 France | |
| 4 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manchester | 🇬🇧 United Kingdom | |
| 2 | Liverpool | 🇬🇧 United Kingdom | |
| 3 | Birmingham | 🇬🇧 United Kingdom | |
| 4 | Leeds | 🇬🇧 United Kingdom | |
| 5 | London | 🇬🇧 United Kingdom | |
| 6 | Cologne | 🇩🇪 Germany | |
| 7 | Brussels | 🇧🇪 Belgium | |
| 8 | Dublin | 🇮🇪 Ireland | |
| 9 | Paris | 🇫🇷 France | |
| 10 | Amsterdam | 🇳🇱 Netherlands |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Budapest Zoo & Botanical Garden | 🇭🇺 Hungary | |
| 2 | British Wildlife Centre | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a European Wood Mouse sighting in Sierra de Guadarrama National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 9th most-seen of the 10 mammals 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.
March–April and June–August
In those months about 10% of wildlife watchers report a European Wood Mouse in Sierra de Guadarrama National Park on a given day, against under 5% in May and September–February, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most European Wood Mouse sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
4th of 4
Of the 4 parks where we can rate European Wood Mouse sightings, Sierra de Guadarrama National Park ranks 4th at under 5%. The best odds are in Snowdonia National Park (United Kingdom, about 20%), Cairngorms National Park (United Kingdom, about 20%) and Pyrénées National Park (France, about 10%).
GBIF citizen-science records
It is estimated from how often the European Wood Mouse is recorded against all the mammals logged in Sierra de Guadarrama National Park (6 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.
