Red squirrelGarden dormouseCommon voleEurasian harvest mouse
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. Most rodents are small though the capybara of South America can weigh up to 45 kg (99 lb).
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 twentieth 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.
Daubenton's batGreater noctule batBrown long-eared bat
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.
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.
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.
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^Gerngross, P.; Ambarli, H.; Angelici, F.M.; Anile, S.; Campbell, R.; Ferreras de Andres, P.; Gil-Sanchez, J.M.; Götz, M.; Jerosch, S.; Mengüllüoglu, D.; Monterosso, P. & Zlatanova, D. (2022). "Felis silvestris". IUCN Red List of Threatened Species. 2022: e.T181049859A181050999. doi:10.2305/IUCN.UK.2022-1.RLTS.T181049859A181050999.en. Retrieved 3 August 2022.
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^McDonald, R. A.; Abramov, A. V.; Stubbe, M.; Herrero, J.; Maran, T.; Tikhonov, A.; Cavallini, P.; Kranz, A.; Giannatos, G.; Kryštufek, B. & Reid, F. (2019). "Mustela nivalis". IUCN Red List of Threatened Species. 2019: e.T70207409A147993366.
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^Gazaryan, S.; Bücs, S. & Çoraman, E. (2021) [errata version of 2020 assessment]. "Miniopterus schreibersii". IUCN Red List of Threatened Species. 2020: e.T81633057A19585652. Retrieved 15 May 2021.
^Maran, T.; Aulagnier, S.; Libois, R.; Kranz, A.; Abramov, A. & Wozencraft, C. (2010). "Mustela lutreola". IUCN Red List of Threatened Species. 2010: e.T14018A4381596.
^Hegyeli, Z. (2020). "Spermophilus citellus". IUCN Red List of Threatened Species. 2020: e.T20472A91282380. doi:10.2305/IUCN.UK.2020-2.RLTS.T20472A91282380.en. Retrieved 18 November 2021.
^McLellan, B. N.; Proctor, M. F.; Huber, D. & Michel, S. (2017). "Ursus arctos". IUCN Red List of Threatened Species. 2017: e.T41688A121229971.
External links
"Animal Diversity Web". University of Michigan Museum of Zoology. 1995–2006. Retrieved 22 May 2007.