List of mammals of Britain sorted alphabetically

American mink

Order: Carnivora Family: Mustelidae
neogale vison

Length: up to 50 cm.

Weight: up to 2 kg.

Atlantic white-sided dolphin

Order: Cetacea Family: Oceanic dolphin
lagenorhynchus acutus

Length: up to 2.8 m.

Weight: up to 230 kg.

Bank vole

Order: Rodent Family: Cricetidae
myodes glareolus

Length: up to 12 cm.

Weight: up to 35 g.

Bechstein's bat

Order: Bat Family: Vespertilionidae
myotis bechsteinii

Length: up to 5 cm.

Weight: up to 12 g.

Black rat

Order: Rodent Family: Muridae
rattus rattus

Length: up to 24 cm.

Weight: up to 250 g.

Blue whale

Order: Cetacea Family: Rorqual
balaenoptera musculus

Length: up to 33 m.

Weight: up to 150 t.

Brandt's bat

Order: Bat Family: Vespertilionidae
myotis brandtii

Length: up to 6 cm.

Weight: up to 10 g.

Brown bear

Order: Carnivora Family: Bear
ursus arctos

Length: up to 2.5 m.

Weight: up to 450 kg.

Brown long-eared bat

Order: Bat Family: Vespertilionidae
plecotus auritus

Length: up to 5 cm.

Weight: up to 10 g.

Brown rat

Order: Rodent Family: Muridae
rattus norvegicus

Length: up to 30 cm.

Weight: up to 1 kg.

Common bottlenose dolphin

Order: Cetacea Family: Oceanic dolphin
tursiops truncatus

Length: up to 3.6 m.

Weight: up to 650 kg.

Common dolphin

Order: Cetacea Family: Oceanic dolphin
delphinus delphis

Length: up to 2 m.

Weight: up to 235 kg.

Common minke whale

Order: Cetacea Family: Rorqual
balaenoptera acutorostrata

Length: up to 9 m.

Weight: up to 10 t.

Common noctule

Order: Bat Family: Vespertilionidae
nyctalus noctula

Length: up to 8 cm.

Weight: up to 36 g.

Common pipistrelle

Order: Bat Family: Vespertilionidae
pipistrellus pipistrellus

Length: up to 5 cm.

Weight: up to 8 g.

Common shrew

Order: Eulipotyphla Family: Shrew
sorex araneus

Length: up to 8 cm.

Weight: up to 16 g.

Common vole

Order: Rodent Family: Cricetidae
microtus arvalis

Length: up to 13 cm.

Weight: up to 40 g.

Cuvier's beaked whale

Order: Cetacea Family: Beaked whale
ziphius cavirostris

Length: up to 6.7 m.

Weight: up to 3 t.

Daubenton's bat

Order: Bat Family: Vespertilionidae
myotis daubentonii

Length: up to 6 cm.

Weight: up to 15 g.

Eastern gray squirrel

Order: Rodent Family: Squirrel
sciurus carolinensis

Length: up to 30 cm.

Weight: up to 600 g.

Eurasian beaver

Order: Rodent Family: Castoridae
castor fiber

Length: up to 1.3 m.

Weight: up to 32 kg.

Eurasian harvest mouse

Order: Rodent Family: Muridae
micromys minutus

Length: up to 7 cm.

Weight: up to 10 g.

Eurasian lynx

Order: Carnivora Family: Felidae
lynx lynx

Length: up to 1.3 m.

Weight: up to 35 kg.

Eurasian otter

Order: Carnivora Family: Mustelidae
lutra lutra

Length: up to 90 cm.

Weight: up to 12 kg.

Eurasian pygmy shrew

Order: Eulipotyphla Family: Shrew
sorex minutus

Length: up to 7 cm.

Weight: up to 6 g.

Eurasian water shrew

Order: Eulipotyphla Family: Shrew
neomys fodiens

Length: up to 10 cm.

Weight: up to 20 g.

European badger

Order: Carnivora Family: Mustelidae
meles meles

Length: up to 81 cm.

Weight: up to 20 kg.

European bison

Order: Artiodactyl Family: Bovidae
bison bonasus

Length: up to 3.5 m.

Weight: up to 1 t.

European edible dormouse

Order: Rodent Family: Dormouse
glis glis

Length: up to 18 cm.

Weight: up to 180 g.

European fallow deer

Order: Artiodactyl Family: Deer
dama dama

Length: up to 1.9 m.

Weight: up to 150 kg.

European hare

Order: Lagomorpha Family: Leporidae
lepus europaeus

Length: up to 68 cm.

Weight: up to 7 kg.

European hedgehog

Order: Rodent Family: Erinaceidae
erinaceus europaeus

Length: up to 30 cm.

Weight: up to 800 g.

European mole

Order: Eulipotyphla Family: Talpidae
talpa europaea

Length: up to 17 cm.

Weight: up to 120 g.

European pine marten

Order: Carnivora Family: Mustelidae
martes martes

Length: up to 58 cm.

Weight: up to 2 kg.

European polecat

Order: Carnivora Family: Mustelidae
mustela putorius

Length: up to 50 cm.

Weight: up to 1.5 kg.

European rabbit

Order: Lagomorpha Family: Leporidae
oryctolagus cuniculus

Length: up to 45 cm.

Weight: up to 2.5 kg.

European water vole

Order: Rodent Family: Cricetidae
arvicola amphibius

Length: up to 26 cm.

Weight: up to 330 g.

European wildcat

Order: Carnivora Family: Felidae
felis silvestris

Length: up to 91 cm.

Weight: up to 8 kg.

False killer whale

Order: Cetacea Family: Oceanic dolphin
pseudorca crassidens

Length: up to 6 m.

Weight: up to 1.842 t.

Fin whale

Order: Cetacea Family: Rorqual
balaenoptera physalus

Length: up to 27 m.

Weight: up to 100 t.

Gervais's beaked whale

Order: Artiodactyl Family: Beaked whale
mesoplodon europaeus

Length: up to 5.2 m.

Weight: up to 1.2 t.

Greater horseshoe bat

Order: Bat Family: Vespertilionidae
rhinolophus ferrumequinum

Length: up to 7 cm.

Weight: up to 34 g.

Greater mouse-eared bat

Order: Bat Family: Vespertilionidae
myotis myotis

Length: up to 8 cm.

Weight: up to 40 g.

Grey long-eared bat

Order: Bat Family: Vespertilionidae
plecotus austriacus

Length: up to 5 cm.

Weight: up to 10 g.

Grey seal

Order: Carnivora Family: Earless seal
halichoerus grypus

Length: up to 3 m.

Weight: up to 315 kg.

Harbor seal

Order: Carnivora Family: Earless seal
phoca vitulina

Length: up to 2 m.

Weight: up to 150 kg.

Harbour porpoise

Order: Cetacea Family: Porpoise
phocoena phocoena

Length: up to 1.8 m.

Weight: up to 70 kg.

Hazel dormouse

Order: Rodent Family: Dormouse
muscardinus avellanarius

Length: up to 9 cm.

Weight: up to 25 g.

House mouse

Order: Rodent Family: Muridae
mus musculus

Length: up to 10 cm.

Weight: up to 39 g.

Humpback whale

Order: Cetacea Family: Rorqual
megaptera novaeangliae

Length: up to 18 m.

Weight: up to 50 t.

Least weasel

Order: Carnivora Family: Mustelidae
mustela nivalis

Length: up to 28 cm.

Weight: up to 110 g.

Lesser horseshoe bat

Order: Bat Family: Vespertilionidae
rhinolophus hipposideros

Length: up to 5 cm.

Weight: up to 9 g.

Lesser noctule

Order: Bat Family: Vespertilionidae
nyctalus leisleri

Length: up to 7 cm.

Weight: up to 18 g.

Lesser white-toothed shrew

Order: Eulipotyphla Family: Shrew
crocidura suaveolens

Length: up to 8 cm.

Weight: up to 7 g.

Moose

Order: Artiodactyl Family: Deer
alces alces

Length: up to 3 m.

Weight: up to 600 kg.

Mountain hare

Order: Lagomorpha Family: Leporidae
lepus timidus

Length: up to 74 cm.

Weight: up to 4.5 kg.

Nathusius's pipistrelle

Order: Bat Family: Vespertilionidae
pipistrellus nathusii

Length: up to 6 cm.

Weight: up to 10 g.

Natterer's bat

Order: Bat Family: Vespertilionidae
myotis nattereri

Length: up to 5 cm.

Weight: up to 13 g.

North Atlantic right whale

Order: Cetacea Family: Balaenidae
eubalaena glacialis

Length: up to 18 m.

Weight: up to 50 t.

Northern bottlenose whale

Order: Cetacea Family: Beaked whale
hyperoodon ampullatus

Length: up to 11 m.

Weight: up to 7.5 t.

Orca

Order: Cetacea Family: Oceanic dolphin
orcinus orca

Length: up to 9 m.

Weight: up to 7 t.

Parti-coloured bat

Order: Bat Family: Vespertilionidae
vespertilio murinus

Length: up to 6 cm.

Weight: up to 23 g.

Red deer

Order: Artiodactyl Family: Deer
cervus elaphus

Length: up to 2.65 m.

Weight: up to 340 kg.

Red fox

Order: Carnivora Family: Canidae
vulpes vulpes

Length: up to 90 cm.

Weight: up to 15 kg.

Red squirrel

Order: Rodent Family: Squirrel
sciurus vulgaris

Length: up to 28 cm.

Weight: up to 340 g.

Red-necked wallaby

Order: diprotodontia Family: macropodidae
notamacropus rufogriseus

Length: up to 90 cm.

Weight: up to 18.6 kg.

Reeves's muntjac

Order: Artiodactyl Family: Deer
muntiacus reevesi

Length: up to 95 cm.

Weight: up to 18 kg.

Reindeer

Order: Artiodactyl Family: Deer
rangifer tarandus

Length: up to 2.26 m.

Weight: up to 200 kg.

Risso's dolphin

Order: Cetacea Family: Oceanic dolphin
grampus griseus

Length: up to 4 m.

Weight: up to 500 kg.

Roe deer

Order: Artiodactyl Family: Deer
capreolus capreolus

Length: up to 1.35 m.

Weight: up to 35 kg.

Sei whale

Order: Cetacea Family: Rorqual
balaenoptera borealis

Length: up to 21 m.

Weight: up to 45 t.

Serotine bat

Order: Bat Family: Vespertilionidae
eptesicus serotinus

Length: up to 8 cm.

Weight: up to 33 g.

Short-tailed field vole

Order: Rodent Family: Cricetidae
microtus agrestis

Length: up to 14 cm.

Weight: up to 70 g.

Siberian roe deer

Order: Artiodactyl Family: Deer
capreolus pygargus

Length: up to 1.4 m.

Weight: up to 48 kg.

Sika deer

Order: Artiodactyl Family: Deer
cervus nippon

Length: up to 1.8 m.

Weight: up to 130 kg.

Soprano pipistrelle

Order: Bat Family: Vespertilionidae
pipistrellus pygmaeus

Length: up to 5 cm.

Weight: up to 8 g.

Sowerby's beaked whale

Order: Artiodactyl Family: Beaked whale
mesoplodon bidens

Length: up to 5.5 m.

Weight: up to 1.5 t.

Sperm whale

Order: Cetacea Family: Physeteroidea
physeter macrocephalus

Length: up to 20 m.

Weight: up to 40 t.

Stoat

Order: Carnivora Family: Mustelidae
mustela erminea

Length: up to 38 cm.

Weight: up to 350 g.

Striped dolphin

Order: Cetacea Family: Oceanic dolphin
stenella coeruleoalba

Length: up to 2.56 m.

Weight: up to 156 kg.

True's beaked whale

Order: Artiodactyl Family: Beaked whale
mesoplodon mirus

Length: up to 5.3 m.

Weight: up to 1.4 t.

Water deer

Order: Artiodactyl Family: Deer
hydropotes inermis

Length: up to 1 m.

Weight: up to 14 kg.

Western barbastelle

Order: Bat Family: Vespertilionidae
barbastella barbastellus

Length: up to 6 cm.

Weight: up to 12 g.

Whiskered bat

Order: Bat Family: Vespertilionidae
myotis mystacinus

Length: up to 5 cm.

Weight: up to 9 g.

White-beaked dolphin

Order: Cetacea Family: Oceanic dolphin
lagenorhynchus albirostris

Length: up to 3.1 m.

Weight: up to 350 kg.

Wild boar

Order: Artiodactyl Family: Suidae
sus scrofa

Length: up to 1.95 m.

Weight: up to 230 kg.

Wolf

Order: Carnivora Family: Canidae
canis lupus

Length: up to 1.3 m.

Weight: up to 110 kg.

Wolverine

Order: Carnivora Family: Mustelidae
gulo gulo

Length: up to 80 cm.

Weight: up to 30 kg.

Wood mouse

Order: Rodent Family: Muridae
apodemus sylvaticus

Length: up to 11 cm.

Weight: up to 30 g.

Yellow-necked mouse

Order: Rodent Family: Muridae
apodemus flavicollis

Length: up to 12 cm.

Weight: up to 60 g.