Mammals of Korea

The common raccoon dog (Nyctereutes procyonoides), also called the Chinese or Asian raccoon dog to distinguish it from the Japanese raccoon dog, is a heavy-set, fox-like canid native to East Asia. Named for its raccoon-like face markings, it is most closely related to foxes. Common raccoon dogs feed on many animals and plant matter, and are unusual among canids (dogs, foxes, and other members of the family Canidae) in that they hibernate during cold winters and can climb trees. They are widespread in their native range, and are invasive in Europe where they were introduced for the fur trade. The similar Japanese raccoon dog (Nyctereutes viverrinus, the tanuki), native to Japan, is the only other living member of the genus Nyctereutes.

The Japanese sea lion (Zalophus japonicus) (Japanese: ニホンアシカ, Nihon ashika, Korean: 강치, 바다사자) was an aquatic mammal that became extinct in the 1970s. It was considered to be a subspecies of the related California sea lion (Z. californianus) until 2003. They inhabited the western North Pacific and its marginal seas including the Sea of Okhotsk and the Sea of Japan, especially around the coastal areas of the Japanese Archipelago and the Korean Peninsula. They generally bred on sandy beaches which were open and flat, but sometimes in rocky areas. They were hunted commercially in the 1900s, leading to their extinction.

The red squirrel (Sciurus vulgaris), also called Eurasian red squirrel, is a species of tree squirrel in the genus Sciurus. It is an arboreal and primarily herbivorous rodent and common throughout Eurasia.

The wild boar (Sus scrofa), also known as the wild swine, common wild pig, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia and North Africa, and has been introduced to the Americas and Oceania. The species is now one of the widest-ranging mammals in the world, as well as the most widespread suiform. It has been assessed as least concern on the IUCN Red List due to its wide range, high numbers, and adaptability to a diversity of habitats. It has become an invasive species in part of its introduced range. Wild boars probably originated in Southeast Asia during the Early Pleistocene and outcompeted other suid species as they spread throughout the Old World.

The Ussuri dhole (Cuon alpinus alpinus), also known as the Eastern Asiatic dhole and the Chinese dhole, is the nominate subspecies of the dhole wild dog native to Asia. The Ussuri dhole subspecies is originally native to the Russian Far East and parts of China, the Korean Peninsula and Mongolia, though it is presumed regionally extinct or extirpated in most of its historical range, and it possibly exists as fragmented populations in the Russian Far East.

The Manchurian sika deer or Dybowski's sika deer (Cervus nippon mantchuricus or Cervus nippon dybowskii) is a subspecies of deer, the largest of the 14 subspecies of sika deer. It was first described by Robert Swinhoe in 1864.

The Ussuri brown bear (Ursus arctos lasiotus), also known as the Ezo brown bear, Russian grizzly bear, or the black grizzly bear, is a subspecies of the brown bear or a population of the Eurasian brown bear (U. a. arctos). One of the largest brown bears, a very large Ussuri brown bear may approach the Kodiak bear in size. It is not to be confused with the North American grizzly bear.

The common bent-wing bat (Miniopterus schreibersii), also known as the Schreibers's long-fingered bat or Schreibers's bat, is a species of insectivorous bat. They appear to have dispersed from a subtropical origin and distributed throughout the southern Palearctic, Ethiopic, Oriental, and Australian regions. In Europe, it is present in the southern half on the continent from Iberia to the Caucasus, with the largest populations found in the warmer Mediterranean area. The common and scientific names honor Carl Franz Anton Ritter von Schreibers.

The Jeju striped field mouse (Apodemus chejuensis) is a field mouse found only on Jejudo, an island in the northern East China Sea off the southwestern coast of South Korea. It was originally described in 1965 as a subspecies of Apodemus agrarius. However, a 1992 study of mitochondrial DNA found that it was in fact a separate species.

The little tube-nosed bat (Murina aurata) is a species of bat. An adult little tube-nosed bat has a body length of 4.0-4.6 cm, a tail length of 2.8-3.6 cm, and a wing length of 3.0-3.3 cm. The species is found across South and East Asia, from the Indian subcontinent to the Korean Peninsula.