Forest dormouse
Dryomys nitedula (Pallas, 1778)
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.

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?
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?
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.
- LCLeast Concern
- NTNear Threatened
- VUVulnerable
- ENEndangered
- CRCritically Endangered
- EWExtinct in the Wild
- 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?
- kingdomAnimalia
- phylumChordata
- classMammalia
- orderRodentia
- familyGliridae
- genusDryomys
- 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
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.
- An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1 - Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf - Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence). - EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1 - Wikidata · CC0 1.0 · 2026-11-11
Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service). - Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).
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CreatureData. (2026). Forest dormouse (Dryomys nitedula). Retrieved from https://creaturedata.com/animals/forest-dormouse
“Forest dormouse (Dryomys nitedula).” CreatureData, 2026, https://creaturedata.com/animals/forest-dormouse.
@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}
}