CreatureData

Forest dormouse

Dryomys nitedula (Pallas, 1778)

LCLeast Concernrodents

The forest dormouse (Dryomys nitedula) is a rodent in the family Gliridae, subfamily Leithiinae, within the order Rodentia of the mammals. It is a small, nocturnal, arboreal herbivore of forest habitat, with a representative adult body mass of 33.6 g.

Forest dormouse (Dryomys nitedula)
Photo: Dodoni · CC BY-SA 3.0 · Wikimedia Commons

Quick facts about the forest dormouse

Its gestation period is 25 days, with 3.2 young per litter and 1.2 litters per year; lifespan is 4 years, with values up to 4.1 years. The IUCN Red List assesses it globally as Least Concern, which is not a threatened category.

Weight
26 g – 33.6 gsrc for Weight
Length
Not recorded
Lifespan
4 years – 4.1 yearssrc for Lifespan
Diet
Herbivoresrc for Diet
Main food
Not recorded
Habitat
forestsrc for Habitat
Gestation
24.7 dayssrc for Gestation
Young per litter or clutch
3.24src for Young per litter or clutch
Litters or clutches a year
1.2src for Litters or clutches a year
Active
At night (nocturnal)src for Active
Lifestyle
Arborealsrc for Lifestyle
Conservation status
Least Concern (IUCN)src for Conservation status
Countries on record
Not recorded

Photos of the forest dormouse

Only freely licensed photos are shown. Each carries its creator and licence.

Where does the forest dormouse live?

Not recorded

What is the forest dormouse?

Quoted from WikipediaCC BY-SA 4.0

The forest dormouse (Dryomys nitedula) is a species of rodent in the family Gliridae found in eastern Europe, the Balkans and parts of western Central Asia. It is categorized as being of least concern in the IUCN List of Threatened Species due to its wide range and stable population trend. Forest dormice have a diploid count (2n) of 48 chromosomes. Even though this species lives in a variety of geographic locations, its greatest population density is in the forests of central Moldova, in Transcaucasia, and in the mountains of Central Asia. In most other locations, population density of this species is rather low. Population density is dependent on many factors. But the main features that this species depends on for choosing a location are the presence of the appropriate food sources as well as good foliage that can be used for a habitat. The reason why the forests in central Moldova have the highest population density is they provide the largest diversity of food sources which are available throughout the year. This location also provides the best type of foliage for the forest dormice to build their nests as well as swing from branches. The combination of both of these aspects allows for this species to have its highest needs met. Therefore, during mating season they produce offspring who also stay in the same general area when they mature. It makes sense not to move from an area if it is providing for your most basic needs.

The common name for Eliomys is the garden dormouse. Dryomys are often compared to Eliomys as they have many similarities. However, Dryomys is smaller. Two more differences between the two are the braincase for Dryomys is more rounded and the auditory bullae is smaller than that of Eliomys. In addition, their tails are slightly different. The Dryomys's tail is more uniform in color than that of Eliomys. The forest dormouse competes in artificial and natural nests with hazel dormice, fat dormice, and birds. Its biggest competitors are those species which eat similar types of food and who live in the same kind of habitat.

From the Wikipedia article “Forest dormouse” (en.wikipedia.org/w/index.php?title=Forest_dormouse&oldid=1381329665), by Wikipedia contributors, licensed under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0). This block is kept separate from our own text.

What does the forest dormouse sound like?

Speaker: BhagyaMohan Recorder: BhagyaMohan · CC0 · Wikimedia Commons

Is the forest dormouse endangered?

The forest dormouse is listed as Least Concern on the IUCN Red List: it is not currently at risk of extinction.

  1. LCLeast Concern
  2. NTNear Threatened
  3. VUVulnerable
  4. ENEndangered
  5. CRCritically Endangered
  6. EWExtinct in the Wild
  7. EXExtinct

Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Least Concern species.

How is the forest dormouse classified?

  1. kingdomAnimalia
  2. phylumChordata
  3. classMammalia
  4. orderRodentia
  5. familyGliridae
  6. genusDryomys
  7. SpeciesDryomys nitedula (Pallas, 1778)

Synonyms Dryomys aspromontis, Dryomys milleri, Dryomys nitedula aspromontis, Dryomys nitedula diamesus, Dryomys nitedula phrygius, Dryomys nitedula pictus, Dryomys nitedula ravijojla, Dryomys pictus, Dryomys yarkandensis, Dyromys milleri, Dyromys nitedula bilkjewiczi, Dyromys nitedula carpathicus, Dyromys nitedula caucasicus, Dyromys nitedula daghestanicus, Dyromys nitedula kurdistanicus, Dyromys nitedula obolenskii, Dyromys nitedula ognevi, Dyromys nitedula pallidus, Dyromys nitedula phrygius, Dyromys nitedula saxatilis, Dyromys nitedula tanaiticus, Dyromys nitedula tichomirowi, Dyromys robustus, Eliomys angelus, Mus nitedula, Myoxus dryas, Myoxus intermedius, Myoxus pictus, Myoxus wingei

Other names and names in other languages (39)
  • Common forest dormouseEnglish
  • Eurasian forest dormouseEnglish
  • زغبة الغاباتArabic
  • زغبة الغابة الأوراسيةArabic
  • Соня ляснаяBelarusian
  • Горски сънливецBulgarian
  • plch lesníCzech
  • TræsyvsoverDanish
  • BaumschläferGerman
  • ΔενδρομυωξόςGreek
  • Muscardino BalcSpanish
  • Muscardino BalcánicoSpanish
  • metsäunihiiriFinnish
  • LérotinFrench
  • Lérotin communFrench
  • נמנמן עציםHebrew
  • Erdei peleHungarian
  • Անտառային քնամոլArmenian
  • DriomioItalian
  • モリヤマネJapanese
  • ҚарақасKazakh
  • Орман қарақасыKazakh
  • 숲겨울잠쥐Korean
  • Miškinė miegapelėLithuanian
  • Tsagaan ZeerMongolian
  • TresyvsoverNorwegian Bokmål
  • BosslaapmuisDutch
  • KoszatkaPolish
  • Koszatka leśnaPolish
  • Pârș cu coada stufoasăRomanian
  • Лесная соняRussian
  • Plch lesnýSlovak
  • drevesni polhSlovenian
  • HasancıkTurkish
  • Ağaç YediuyuruTurkish
  • CevizkıranTurkish
  • Orman yediuyuruTurkish
  • Соня лісоваUkrainian
  • 林睡鼠Chinese

Catalogue of LifeWikipediaiNaturalistWikidataIUCN Red List

Relatives of the forest dormouse

Other species in the same genus Dryomys.

CompareForest dormouse vs Woolly dormouseForest dormouse vs Balochistan forest dormouseForest dormouse vs Dryomys apulus

Common questions

Each answer is written from the sourced facts on this page, and only where they hold the answer.

What kind of animal is the forest dormouse?

The forest dormouse is a rodent, a mammal in the family Gliridae and order Rodentia. It is also called the common forest dormouse or Eurasian forest dormouse.

How heavy is a forest dormouse?

An adult forest dormouse has a representative body mass of 33.6 g, which places it in the small size class.

What does the forest dormouse eat?

The forest dormouse is a herbivore.

Where does the forest dormouse live?

The forest dormouse lives in forest habitat, where it is arboreal and nocturnal.

Is the forest dormouse endangered?

No. The IUCN Red List assesses the forest dormouse globally as Least Concern, which is not a threatened category.

How long does a forest dormouse live?

The forest dormouse has a lifespan of 4 years, with values up to 4.1 years reported.

How many young does a forest dormouse have?

The forest dormouse has 3.2 young per litter and 1.2 litters per year, after a gestation period of 25 days.

Sources and how to cite this page

Data as of 2026-11-11. How this page is put together.

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APA

CreatureData. (2026). Forest dormouse (Dryomys nitedula). Retrieved from https://creaturedata.com/animals/forest-dormouse

MLA

“Forest dormouse (Dryomys nitedula).” CreatureData, 2026, https://creaturedata.com/animals/forest-dormouse.

BibTeX
@misc{forest_dormouse_2026,
  title = {Forest dormouse (Dryomys nitedula)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/forest-dormouse},
  note = {Data as of 2026-11-11}
}