There are 27 mammal species native to Ireland or naturalised in both the Republic of Ireland and Northern Ireland before 1500. The Red List of Irish terrestrial mammals was updated in 2019, with assessments of these 27 species. One species is locally extinct, one is vulnerable and 25 are least concern species. Not assessed were nine mammal species that were introduced after 1500.[1]
The following tags are used to highlight each species' conservation status as assessed on the IUCN Red List:
EX
Extinct
No reasonable doubt that the last individual has died.
EW
Extinct in the wild
Known only to survive in captivity or as a naturalized populations well outside its previous range.
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.
Order: Diprotodontia (kangaroos, wallabies, wombats and allies)
Though most marsupials make up a great part of the fauna in the Australian region, the red-necked wallaby has been introduced to Ireland: a population is currently breeding on Lambay island.[2]
Family: Macropodidae (kangaroos, wallabies, and kin)
Genus: Notamacropus
Red-necked wallaby, N. rufogriseusEN introduced
Order: Rodentia (rodents)
Red squirrel
Rodents make up the largest order of mammals, with over 40% of mammalian species. 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, S. carolinensisLC introduced
The lagomorphs comprise two families, Leporidae (hares and rabbits), and Ochotonidae (pikas). Though they 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.
The order Erinaceomorpha contains a single family, Erinaceidae, which comprise the hedgehogs and gymnures. The hedgehogs are easily recognised by their spines while gymnures look more like large rats.
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 mammals.
North Atlantic right whaleHumpback whale divingBelugaHarbour porpoiseRisso's dolphinBull killer whale
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.
Carnivorans include over 260 species, the majority of which eat meat as their primary dietary item. They have a characteristic skull shape and dentition.
Walrus, O. rosmarusVU presence uncertain, vagrant[27]
Order: Artiodactyla (even-toed ungulates)
Red deer
Main article: Deer of Ireland
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, including many that are of great economic importance to humans.
Brown bear, Ursus arctos,[35] see Bears in Ireland
Comparison with Great Britain
The following species are found in Great Britain but not in Ireland:
Field vole, Microtus agrestis
Common vole, M. arvalis
Water vole, Arvicola terrestris
Harvest mouse, Micromys minutus
Yellow-necked mouse, A. flavicollis
Edible dormouse, Glis glis
European mole, Talpa europaea
Common shrew, Sorex araneus
Eurasian water shrew, Neomys fodiens
Lesser white-toothed shrew, Crocidura suaveolens
Greater horseshoe bat, Rhinolophus ferrumequinum
Greater mouse-eared bat, Myotis myotis
Bechstein's bat, M. bechsteini
Parti-coloured bat, Vespertilio murinus
Serotine bat, Eptesicus serotinus
Northern bat, E. nilssoni
Common noctule, Nyctalus noctula
Barbastelle, Barbastella barbastellus
Grey long-eared bat, Plecotus austriacus
Least weasel, Mustela nivalis
European polecat, M. putorius
European wildcat, Felis silvestris
Wild boar, Sus scrofa
Water deer, Hydropotes inermis introduced c. 1896
Eurasian beaver, Castor fiber reintroduced 2009
See also
List of chordate orders
Lists of mammals by region
Mammal classification
Fauna of Ireland
Deer of Ireland
Wolves in Ireland
Bears in Ireland
References
Marnell, F.; Looney, D. & Lawton, C. (2019). Ireland Red List No. 12: Terrestrial Mammals. Belfast, Dublin and Galway: Northern Ireland Environment Agency, National Parks and Wildlife Service, Department of the Culture, Heritage and the Gaeltacht and National University of Ireland.
Amori, G.; Hutterer, R.; Kryštufek, B.; Yigit, N.; Mitsain, G.; Muñoz, L. J. P. (2010). "Sciurus vulgaris". IUCN Red List of Threatened Species. 2010: e.T20025A9136220.
Kryštufek, B.; Palomo, L.J.; Hutterer, R.; Mitsain, G. & Yigit, N. (2015). "Rattus rattus". IUCN Red List of Threatened Species. 2015: e.T19360A115148682.
Emma Sheehy, Colin Lawton, 2015 Distribution of the non-native Hazel Dormouse (Muscardinus avellanarius) in Ireland. Irish Naturalists' Journal Volume 34, Part 1: 13-16.
Juste, J. & Paunović, M. (2016). "Nyctalus leisleri". IUCN Red List of Threatened Species. 2016: e.T14919A22016159.
Hutson, A. M.; Spitzenberger, F.; Juste, J.; Aulagnier, S.; Palmeirim, J.; Karatas, A. & Paunovic, M. (2010). "Pipistrellus nathusii". IUCN Red List of Threatened Species. 2010: e.T17316A6966886.
Taylor, P. (2016). "Rhinolophus hipposideros". IUCN Red List of Threatened Species. 2016: e.T19518A21972794.
Cooke, J.G. & Reeves, R. (2018). "Balaena mysticetus". IUCN Red List of Threatened Species. 2018: e.T2467A50347659. Retrieved 30 May 2021.
Cooke, J.G. (2018). "Balaenoptera musculus". IUCN Red List of Threatened Species. 2018: e.T2477A156923585. Retrieved 30 May 2021.
Reeves, R.; Pitman, R.L. & Ford, J.K.B. (2017). "Orcinus orca". IUCN Red List of Threatened Species. 2017: e.T15421A50368125.
Hoffmann, M.; Sillero-Zubiri, C. (2016). "Vulpes vulpes". IUCN Red List of Threatened Species. 2016: e.T23062A46190249.
Roos, A.; Loy, A.; de Silva, P.; Hajkova, P.; Zemanová, B. (2015). "Lutra lutra". IUCN Red List of Threatened Species. 2015: e.T12419A21935287.
Herrero, J.; Kranz, A.; Skumatov, D.; Abramov, A.V.; Maran, T. & Monakhov, V.G. (2016). "Martes martes". IUCN Red List of Threatened Species. 2016: e.T12848A45199169.
Kranz, A.; Abramov, A. V.; Herrero, J. & Maran, T. (2016). "Meles meles". IUCN Red List of Threatened Species. 2016: e.T29673A45203002.
Reid, F.; Helgen, K. & Kranz, A. (2016). "Mustela erminea". IUCN Red List of Threatened Species. 2016: e.T29674A45203335.
Reid, F.; Schiaffini, M. & Schipper, J. (2016). "Neovison vison". IUCN Red List of Threatened Species. 2016: e.T41661A45214988.
Cotton, D.C.F. (2007). "A critical review of Irish records of walrus Odobenus rosmarus (L.) with some unpublished observations from Counties Donegal, Sligo, and Galway". Ir. Nat. J. 28: 349–355.
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