List of mammals of Ireland
There are 53 mammal species native to Ireland or naturalised in both the Republic of Ireland and Northern Ireland before 1500, of which 27[1] are terrestrial mammals and 26[2] are aquatic mammals. According to The Red List of Irish terrestrial mammals in 2019, locally, the black rat is listed as vulnerable, the grey wolf is extinct, and the remaining 25 terrestrial mammals are least concern. Not assessed were nine mammal species that were introduced after 1500. The following tags are used to highlight each species' conservation status as assessed on the IUCN Red List:
| CR | Critically endangered | The species is in imminent risk of extinction in the wild. |
| EN | Endangered | The species is facing an extremely high risk of extinction in the wild. |
| VU | Vulnerable | The species is facing a high risk of extinction in the wild. |
| NT | Near threatened | The species does not meet any of the criteria that would categorise it as risking extinction but it is likely to do so in the future. |
| LC | Least concern | There are no current identifiable risks to the species. |
| DD | Data deficient | There is inadequate information to make an assessment of the risks to this species. |
This article refers to species' global IUCN conservation status (as opposed to local status).
Diprotodontia (kangaroos and wallabies)
Although marsupials are only native to Australasia and the Americas, the red-necked wallaby has been introduced to Ireland: a population has been breeding on Lambay island since the 1950s.[3]
- Family: Macropodidae (kangaroos, wallabies, and kin)
- Genus: Notamacropus
- Red-necked wallaby, N. rufogriseus EN (introduced)
- Genus: Notamacropus
Rodentia (rodents)

Rodents are the largest order of mammals, making up over 40% of mammal species globally. They have two incisors in the upper and lower jaw which grow continually and must be kept short by gnawing.
- Suborder: Sciurognathi
- Family: Sciuridae (squirrels)
- Subfamily: Sciurinae
- Genus: Sciurus
- Eastern grey squirrel, Sciurus carolinensis LC (introduced)
- Red squirrel, Sciurus vulgaris LC
- Genus: Sciurus
- Subfamily: Sciurinae
- Family: Cricetidae
- Subfamily: Arvicolinae
- Genus: Clethrionomys
- Bank vole, Clethrionomys glareolus LC (introduced)
- Genus: Clethrionomys
- Subfamily: Arvicolinae
- Family: Cricetidae
- Subfamily: Arvicolinae
- Genus: Microtus
- Field vole, Microtus agrestis LC (introduced)[4]
- Genus: Microtus
- Subfamily: Arvicolinae
- Family: Muridae (mice, rats, etc.)
- Subfamily: Murinae
- Genus: Apodemus
- Wood mouse, Apodemus sylvaticus LC
- Genus: Mus
- House mouse, Mus musculus LC
- Genus: Rattus
- Genus: Apodemus
- Subfamily: Murinae
- Family: Gliridae
- Subfamily: Leithiinae
- Genus: Muscardinus
- Hazel dormouse, M. avellanarius LC (introduced)
- Genus: Muscardinus
- Subfamily: Leithiinae
- Family: Sciuridae (squirrels)
- Suborder: Hystricomorpha
- Family: Echimyidae (neotropical spiny rats)
- Subfamily: Echimyinae
- Family: Echimyidae (neotropical spiny rats)
Lagomorpha (lagomorphs)

Although lagomorphs can resemble rodents, and were classified as a superfamily in that order until the early 20th century, they have since been considered a separate order. They differ from rodents in a number of physical characteristics, such as having four incisors in the upper jaw rather than two.
- Family: Leporidae (rabbits, hares)
- Genus: Lepus
- European hare, Lepus europaeus LC (introduced)
- Irish hare, Lepus timidus hibernicus LC
- Genus: Oryctolagus
- European rabbit, Oryctolagus cuniculus EN (naturalised)
- Genus: Lepus
Artiodactyla (even-toed ungulates)

The even-toed ungulates are ungulates whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in perissodactyls. There are about 220 artiodactyl species globally, including many that are of great economic importance to humans.
- Family: Cervidae (deer)
- Subfamily: Cervinae
- Genus: Cervus
- Genus: Dama
- European fallow deer, Dama dama LC (naturalised)
- Subfamily: Capreolinae
- Genus: Capreolus
- Roe deer, C. capreolus LC (introduced)
- Genus: Muntiacus
- Reeves's muntjac, M. reevesi LC (introduced)
- Genus: Capreolus
- Subfamily: Cervinae
- Family: Bovidae
- Subfamily: Caprinae
- Genus: Capra
- Feral goat (including Irish goat) C. hircus (introduced)
- Genus: Capra
- Subfamily: Caprinae
Eulipotyphla (hedgehogs, shrews and moles)


The order Eulipotyphla contains the hedgehogs, shrews, and moles. Hedgehogs are easily recognised by their spines, shrews closely resemble mice, while moles (which are absent from Ireland)[5] are stout-bodied burrowers.
- Family: Erinaceidae (hedgehogs)
- Subfamily: Erinaceinae
- Genus: Erinaceus
- European hedgehog, Erinaceus europaeus NT
- Genus: Erinaceus
- Subfamily: Erinaceinae
- Family: Soricidae (shrews)
- Subfamily: Soricinae
- Genus: Crocidura
- Greater white-toothed shrew, Crocidura russula LC (introduced)
- Genus: Sorex
- Eurasian pygmy shrew, Sorex minutus LC
- Genus: Crocidura
- Subfamily: Soricinae
Chiroptera (bats)


The bats' most distinguishing feature is that their forelimbs are developed as wings, making them the only mammals capable of flight. Bat species account for about 20% of all mammal species globally.
- Family: Vespertilionidae
- Subfamily: Myotinae
- Genus: Myotis
- Daubenton's bat, Myotis daubentonii LC
- Whiskered bat, Myotis mystacinus LC
- Natterer's bat, Myotis nattereri LC
- Genus: Myotis
- Subfamily: Vespertilioninae
- Genus: Nyctalus
- Lesser noctule, Nyctalus leisleri LC
- Genus: Pipistrellus
- Nathusius' pipistrelle, Pipistrellus nathusii LC
- Common pipistrelle, Pipistrellus pipistrellus LC
- Soprano pipistrelle, Pipistrellus pygmaeus LC
- Genus: Plecotus
- Brown long-eared bat, Plecotus auritus LC
- Genus: Nyctalus
- Subfamily: Myotinae
- Family: Rhinolophidae
- Subfamily: Rhinolophinae
- Genus: Rhinolophus
- Lesser horseshoe bat, Rhinolophus hipposideros LC
- Genus: Rhinolophus
- Subfamily: Rhinolophinae
Carnivora (carnivorans)


Carnivorans include over 260 species globally, the majority of which eat meat as their primary dietary item. They have a characteristic skull shape and dentition.
- Suborder: Caniformia
- Family: Canidae (dogs, foxes)
- Family: Mustelidae (mustelids)
- Genus: Lutra
- European otter, Lutra lutra NT
- Genus: Martes
- European pine marten, Martes martes LC
- Genus: Meles
- European badger, Meles meles LC
- Genus: Mustela
- Irish stoat, Mustela erminea hibernica LC
- Genus: Neogale
- American mink, Neogale vison LC (introduced)
- Genus: Lutra
- Family: Phocidae (earless seals)
- Genus: Halichoerus
- Grey seal, Halichoerus grypus LC
- Genus: Phoca
- Common seal, Phoca vitulina LC
- Genus: Cystophora
- Hooded seal, C. cristatus EN (vagrant)
- Genus: Erignathus
- Bearded seal, E. barbatus NT (vagrant)
- Genus: Pagophilus
- Harp seal, P. groenlandicus NT (vagrant)
- Genus: Pusa
- Ringed seal, P. hispida LC (vagrant)
- Genus: Halichoerus
- Family: Odobenidae (walruses)
Cetacea (whales)




The order Cetacea includes whales, dolphins, and porpoises. They are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.
- Suborder: Mysticeti
- Family: Balaenidae
- Genus: Balaena
- Bowhead whale, B. mysticetus LC (vagrant)
- Genus: Eubalaena
- North Atlantic right whale, E. glacialis CR (vagrant)
- Genus: Balaena
- Family: Balaenopteridae (rorqual)
- Subfamily: Balaenopterinae
- Genus: Balaenoptera
- Common minke whale, Balaenoptera acutorostrata LC
- Sei whale, Balaenoptera borealis EN
- Fin whale, Balaenoptera physalus VU
- Blue whale, B. musculus EN
- Genus: Balaenoptera
- Subfamily: Balaenopterinae
- Family: Megapterinae
- Genus: Megaptera
- Humpback whale, Megaptera novaeangliae LC
- Genus: Megaptera
- Family: Balaenidae
- Suborder: Odontoceti
- Family: Phocoenidae (porpoises)
- Genus: Phocoena
- Harbour porpoise, Phocoena phocoena LC
- Genus: Phocoena
- Family: Ziphidae (beaked whales)
- Genus: Ziphius
- Cuvier's beaked whale, Ziphius cavirostris LC
- Genus: Ziphius
- Subfamily: Hyperoodontinae
- Genus: Hyperoodon
- Northern bottlenose whale, Hyperoodon ampullatus NT
- Genus: Mesoplodon
- Sowerby's beaked whale, Mesoplodon bidens LC
- Gervais' beaked whale, Mesoplodon europaeus LC
- True's beaked whale, Mesoplodon mirus LC
- Genus: Hyperoodon
- Family: Delphinidae (marine dolphins)
- Genus: Lagenorhynchus
- White-beaked dolphin, Lagenorhynchus albirostris LC
- Genus: Leucopleurus
- Atlantic white-sided dolphin, Leucopleurus acutus LC
- Genus: Delphinus
- Common dolphin, Delphinus delphis LC
- Genus: Tursiops
- Common bottlenose dolphin, Tursiops truncatus LC
- Genus: Stenella
- Striped dolphin, Stenella coeruleoalba LC
- Genus: Grampus
- Risso's dolphin, Grampus griseus LC
- Genus: Globicephala
- Long-finned pilot whale, Globicephala melas LC
- Genus: Pseudorca
- False killer whale, Pseudorca crassidens NT
- Genus: Lagenorhynchus
- Family: Physeteridae (sperm whales)
- Genus: Physeter
- Sperm whale, Physeter macrocephalus VU
- Genus: Physeter
- Family: Kogiidae
- Genus: Kogia
- Pygmy sperm whale, Kogia breviceps LC
- Genus: Kogia
- Family: Phocoenidae (porpoises)
- Superfamily: Platanistoidea
- Family: Monodontidae (narwhals)
- Genus: Delphinapterus
- Beluga, Delphinapterus leucas LC vagrant
- Genus: Orcinus
- Orca, Orcinus orca DD
- Genus: Delphinapterus
- Family: Monodontidae (narwhals)
Locally extinct

The following species are locally extinct in the country:
- Wolf, Canis lupus, see Wolves in Ireland
- Eurasian lynx, Lynx lynx[7]
- Reindeer, Rangifer tarandus[8]
- Wild boar, Sus scrofa[9]
- Brown bear, Ursus arctos,[10] see Bears in Ireland
Globally extinct
The following species were present in Ireland, and are now extinct globally:[11]
- Irish elk, Megaloceros giganteus
- Woolly mammoth, Mammuthus primigenius
- Cave hyena, Crocuta spelaea
See also
- Lists of mammals by region
- List of mammals of Great Britain
- Fauna of Ireland
- Deer of Ireland
- Wolves in Ireland
- Bears in Ireland
- Mammal classification
References
- ^ Marnell, F.; Looney, D.; Lawton, C. (2019), "Ireland Red List No. 12: Terrestrial Mammals" (PDF), National Parks and Wildlife Service, Department of the Culture, Heritage and the Gaeltacht, Dublin, Ireland
- ^ "Species". Irish Whale and Dolphin Group. Retrieved 27 February 2026.
- ^ Glynn, Niall (2 October 2022). "Lambay Island is home to Ireland's wallabies". BBC Northern Ireland. Retrieved 5 March 2026.
Rupert Baring introduced the first wallabies to the island in the 1950s
- ^ Moynagh, J.; Viscardi, P. (2022). "Vouchered record of Field Vole (Microtus agrestis) in Ireland from Co. Monaghan". Irish Naturalists' Journal. 39: 104–106.
- ^ "Mole". Ulster Wildlife. Retrieved 28 February 2026.
- ^ Whooley, Pádraig. "Kerry Walrus March 14th re-sighted in Wales March 20th: Update 29th March". Irish Whale and Dolphin Group. Retrieved 28 February 2026.
- ^ Brent, Harry (September 29, 2020). "Lynxes could be reintroduced to Ireland". The Irish Post.
- ^ Hurley, Jim. "Reindeer were once common around Ireland". Irish Independent. Retrieved 28 February 2026.
- ^ Keuling, O. & Leus, K. (2019). "Sus scrofa". IUCN Red List of Threatened Species. 2019 e.T41775A44141833.
- ^ McLellan, B. N.; Proctor, M. F.; Huber, D. & Michel, S. (2017). "Ursus arctos". IUCN Red List of Threatened Species. 2017 e.T41688A121229971.
- ^ "Ice Age Ireland Cool Fossils!" (PDF). National Museum of Ireland. January 2025. Retrieved 5 March 2026.