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Species · Mammals

Hazel dormouse

Muscardinus avellanarius

1,733Records since 2000
OctoberPeak month
25Counties with records
Least ConcernIUCN Red List

When it is recorded

Jan77
Feb49
Mar45
Apr39
May127
Jun157
Jul76
Aug79
Sep216
Oct267
Nov138
Dec39

GBIF records by month, 2000–2025 (all years combined).

Where it is recorded

#CountyNationRecordsShare
1Worcestershire England360
2Monmouthshire Wales330
3Carmarthenshire Wales170
4Powys Wales121
5Denbighshire Wales62
6Gwynedd Wales34
7Herefordshire, County of England33
8Devon England29
9Ceredigion Wales23
10Kent England21
11Pembrokeshire Wales20
12Conwy Wales15
13Gloucestershire England11
14Swansea Wales11
15Essex England10
584 England1,130 Wales

Records per county (GADM level 2) and per nation; one record can count towards several areas. 25 counties in all.

About this species

Records since 2000
1,733
Peak month
October
Counties with records
25
IUCN Red List
Least Concern
Scientific name
Muscardinus avellanarius
Also known as
Dormouse
Group
Mammals
NBN Atlas records since 2000
1,706
Conservation designations
Bern Convention, Wildlife and Countryside Act 1981, Habitats Directive, Biodiversity List – England, GB Red List (2001 IUCN criteria), Biodiversity List – Wales, UK BAP priority species, Habitats Regulations 2010
Kingdom
Animalia
Phylum
Chordata
Class
Mammalia
Order
Rodentia
Family
Gliridae
Genus
Muscardinus
Name with authority
Muscardinus avellanarius (Linnaeus, 1758)
Described
1758
Contributing datasets
20

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q207148 · GBIF 2439658