Pleistocene Park
Encyclopedia
Pleistocene Park is a nature reserve south of Chersky
Chersky (settlement)
Chersky is an urban locality and the administrative center of Nizhnekolymsky District of the Sakha Republic, Russia, located on the Kolyma River east of Yakutsk. Population:...

 in the Sakha Republic in northeastern Siberia
Siberia
Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...

, where an attempt is being made to recreate the northern steppe
Steppe
In physical geography, steppe is an ecoregion, in the montane grasslands and shrublands and temperate grasslands, savannas, and shrublands biomes, characterized by grassland plains without trees apart from those near rivers and lakes...

 grassland ecosystem
Ecosystem
An ecosystem is a biological environment consisting of all the organisms living in a particular area, as well as all the nonliving , physical components of the environment with which the organisms interact, such as air, soil, water and sunlight....

 that flourished in the area during the last ice age
Ice age
An ice age or, more precisely, glacial age, is a generic geological period of long-term reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental ice sheets, polar ice sheets and alpine glaciers...

.

Goals

The effort is being led by Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n researcher Sergey Zimov
Sergey Zimov
Sergei Zimov is a Russian scientist who serves as the Director of the Northeast Science Station and is one of the founders of Pleistocene Park. He is best known for his work in advocating the theory that human overhunting of large herbivores during the Pleistocene caused Siberia’s grassland-steppe...

, with hopes to back the hypothesis
Hypothesis
A hypothesis is a proposed explanation for a phenomenon. The term derives from the Greek, ὑποτιθέναι – hypotithenai meaning "to put under" or "to suppose". For a hypothesis to be put forward as a scientific hypothesis, the scientific method requires that one can test it...

 that hunting, and not climate change, destroyed the wildlife.

The aim of Pleistocene
Pleistocene
The Pleistocene is the epoch from 2,588,000 to 11,700 years BP that spans the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....

 Park is to recreate the ancient taiga/tundra grasslands that were widespread in the region during the last ice age. The key concept is that animals, more than temperature, maintained that ecosystem. This argument is the justification for rewilding
Rewilding (Conservation Biology)
Rewilding is large-scale conservation aimed at restoring and protecting core wilderness areas, providing connectivity between such areas, and protecting or reintroducing apex predators and keystone species...

 Pleistocene Park's landscape with megafauna that was previously abundant in the area, as evidenced by the fossil record.

Progress and plans

In 1988, Yakutian horse
Yakutian horse
The Yakutian horse , sometimes called the Yakut horse, Yakut pony or simply the Yakut, is a rare native horse breed from the Siberian Sakha Republic region. It is large compared to the otherwise similar Mongolian horse and Przewalski's horse breeds...

s were introduced as a first step in recreating the ancient landscape as horses were abundant back then. Over the years, as the horses multiplied, it was discovered that in areas where the horses grazed, mosses and weeds were replaced by grasses which rapidly began to spread as the range of the horses was enlarged. In company of the horses are other forms of Pleistocene survivors which still reside in the local wilderness such as reindeer
Reindeer
The reindeer , also known as the caribou in North America, is a deer from the Arctic and Subarctic, including both resident and migratory populations. While overall widespread and numerous, some of its subspecies are rare and one has already gone extinct.Reindeer vary considerably in color and size...

, snow sheep
Snow sheep
The snow sheep , or Siberian bighorn sheep, is a species of sheep, which comes from the mountainous areas in the northeast of Siberia. One subspecies, the Putorana Snow Sheep lives isolated from the other forms in the Putoran mountains...

, elk
Elk
The Elk is the large deer, also called Cervus canadensis or wapiti, of North America and eastern Asia.Elk may also refer to:Other antlered mammals:...

 and moose
Moose
The moose or Eurasian elk is the largest extant species in the deer family. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a dendritic configuration...

. However in order for full restoration of the ancient ecosystem to take place biodiversity must be increased and populations must rise to larger numbers than they are today. The next phase was the introduction of Wood bison
Wood Bison
The Wood Bison, Bison bison athabascae, also called Mountain Bison, Wood Buffalo or Mountain Buffalo, is a distinct northern subspecies or ecotype of the American Bison...

 or Wisent
Wisent
The wisent , Bison bonasus, also known as the European bison or European wood bison, is a species of Eurasian bison. It is the heaviest surviving land animal in Europe; a typical wisent is about long, not counting a tail of long, and tall. Weight typically can range from , with an occasional big...

 into the park as the fossil record shows that the extinct but closely related Steppe Wisent
Steppe Wisent
The Steppe Bison or steppe wisent was a bison found on steppes throughout Europe, Central Asia, Beringia, and North America during the Quaternary...

 was present in large numbers, quite possibly well into the Holocene era. In September 2010 the musk-ox from Wrangel island
Wrangel Island
Wrangel Island is an island in the Arctic Ocean, between the Chukchi Sea and East Siberian Sea. Wrangel Island lies astride the 180° meridian. The International Date Line is displaced eastwards at this latitude to avoid the island as well as the Chukchi Peninsula on the Russian mainland...

  were reintroduced.. Seven months later, red deers and wisents arrived in park .. .
Other ungulates such as the yak
Yak
The yak, Bos grunniens or Bos mutus, is a long-haired bovine found throughout the Himalayan region of south Central Asia, the Tibetan Plateau and as far north as Mongolia and Russia. In addition to a large domestic population, there is a small, vulnerable wild yak population...

 or bactrian camel
Bactrian camel
The Bactrian camel is a large, even-toed ungulate native to the steppes of central Asia. It is presently restricted in the wild to remote regions of the Gobi and Taklamakan Deserts of Mongolia and Xinjiang. A small number of wild Bactrian camels still roam the Mangystau Province of southwest...

 are hardy animals well adapted to the temperature fluctuations and have also been considered for introduction.

It has been proposed that the introduction of a variety of large herbivores will recreate their ancient ecological niches in Siberia and regenerate the Pleistocene terrain with its different ecological habitats such as taiga, tundra, steppe and alpine terrain.

The main object is however to recreate the extensive grasslands that covered the Beringia region in the late Pleistocene. This form of grassland (which is also known as Mammoth-tundra) was inhabited by a diverse set of large and medium herbivores. Back in the Pleistocene the area was populated by many species of grazers which assembled in large herds similar in size to those in Africa today. Species that roamed the great grasslands included the Woolly mammoth
Woolly mammoth
The woolly mammoth , also called the tundra mammoth, is a species of mammoth. This animal is known from bones and frozen carcasses from northern North America and northern Eurasia with the best preserved carcasses in Siberia...

, Steppe wisent
Steppe Wisent
The Steppe Bison or steppe wisent was a bison found on steppes throughout Europe, Central Asia, Beringia, and North America during the Quaternary...

, Reindeer
Reindeer
The reindeer , also known as the caribou in North America, is a deer from the Arctic and Subarctic, including both resident and migratory populations. While overall widespread and numerous, some of its subspecies are rare and one has already gone extinct.Reindeer vary considerably in color and size...

, Lena horse, Saiga antelope
Saiga Antelope
The saiga is a Critically Endangered antelope which originally inhabited a vast area of the Eurasian steppe zone from the foothills of the Carpathians and Caucasus into Dzungaria and Mongolia. They also lived in North America during the Pleistocene...

, Muskox.

At the edges of these large stretches of grassland there could be found more shrub-like terrain and dry conifer forests (similar to the taiga). In this terrain there was to be found the browsers
Browsing (predation)
Browsing is a type of herbivory in which an herbivore feeds on leaves, soft shoots, or fruits of high growing, generally woody, plants such as shrubs. This is contrasted with grazing, usually associated with animals feeding on grass or other low vegetation...

 of the Pleistocene. This group of megafauna included Woolly rhinoceros
Woolly Rhinoceros
The woolly rhinoceros is an extinct species of rhinoceros that was common throughout Europe and Asia during the Pleistocene epoch and survived the last glacial period. The genus name Coelodonta means "cavity tooth"...

, Moose
Moose
The moose or Eurasian elk is the largest extant species in the deer family. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a dendritic configuration...

, Elk
Elk
The Elk is the large deer, also called Cervus canadensis or wapiti, of North America and eastern Asia.Elk may also refer to:Other antlered mammals:...

, Yukon wild ass, Bactrian camel
Bactrian camel
The Bactrian camel is a large, even-toed ungulate native to the steppes of central Asia. It is presently restricted in the wild to remote regions of the Gobi and Taklamakan Deserts of Mongolia and Xinjiang. A small number of wild Bactrian camels still roam the Mangystau Province of southwest...

. The more mountainous terrain was occupied by several species of mountain going animals like the Snow sheep
Snow sheep
The snow sheep , or Siberian bighorn sheep, is a species of sheep, which comes from the mountainous areas in the northeast of Siberia. One subspecies, the Putorana Snow Sheep lives isolated from the other forms in the Putoran mountains...

.

Back in the Pleistocene there was also a great variety of carnivores as well. On the plains there were prides of beringian cave lion. These large cats were the apex predators of the region, but also shared their habitat with other predators such as grey wolf, brown bear
Brown Bear
The brown bear is a large bear distributed across much of northern Eurasia and North America. It can weigh from and its largest subspecies, the Kodiak Bear, rivals the polar bear as the largest member of the bear family and as the largest land-based predator.There are several recognized...

, wolverine
Wolverine
The wolverine, pronounced , Gulo gulo , also referred to as glutton, carcajou, skunk bear, or quickhatch, is the largest land-dwelling species of the family Mustelidae . It is a stocky and muscular carnivore, more closely resembling a small bear than other mustelids...

 and arctic fox
Arctic fox
The arctic fox , also known as the white fox, polar fox or snow fox, is a small fox native to Arctic regions of the Northern Hemisphere and is common throughout the Arctic tundra biome. The Greek word alopex, means a fox and Vulpes is the Latin version...

.

Other herbivores which were abundant during the Pleistocene in this region but which are now faced with possible extinction in their remaining habitats is the saiga antelope
Saiga Antelope
The saiga is a Critically Endangered antelope which originally inhabited a vast area of the Eurasian steppe zone from the foothills of the Carpathians and Caucasus into Dzungaria and Mongolia. They also lived in North America during the Pleistocene...

 which can form massive herds that keep the vegetation down.

The most controversial aspect of the reintroduction of species to the park are the carnivores. Most of these species are however already present in the region such as grey wolf, wolverines, Eurasian lynx
Eurasian Lynx
The Eurasian lynx is a medium-sized cat native to European and Siberian forests, South Asia and East Asia. It is also known as the European lynx, common lynx, the northern lynx, and the Siberian or Russian lynx...

, red fox
Red Fox
The red fox is the largest of the true foxes, as well as being the most geographically spread member of the Carnivora, being distributed across the entire northern hemisphere from the Arctic Circle to North Africa, Central America, and the steppes of Asia...

 and Eurasian brown bear
Eurasian Brown Bear
The Eurasian brown bear is a subspecies of brown bear, found across northern Eurasia. The Eurasian brown bear is also known as the common brown bear, European brown bear and colloquially by many other names....

. However there have been suggestions for the rewilding of more Pleistocene-like carnivores as there is a need for large carnivores to keep control over growing populations of herbivores. Suggestions include reintroducing the amur leopard
Amur Leopard
The Amur leopard , also known as the Far Eastern leopard, Korean leopard, and Manchurian leopard is one of nine recognised subspecies of leopard. It is a wild feline predator native to the mountainous areas of the Russian Far East. It used to inhabit the forests of Korea and China, but it has...

 which was present in the area up until historical times and which is now facing a bitter struggle for survival in a small habitat on the eastern coast of Russia.

The same has been proposed for the Siberian Tiger, which is one of the largest and most feared land carnivores on earth but which has suffered a fate similar to that of the Amur leopard with which it shares its range. Perhaps the most controversial of all reintroductions is that of the Asiatic lion
Asiatic Lion
The Asiatic lion also known as the Indian lion, Persian lion and Eurasian Lion is a subspecies of lion. The only place in the wild where the lion is found is in the Gir Forest of Gujarat, India...

 which is on the verge of extinction, surviving only in a small reservation in the Gir region of west India. Lions were once one of the most widespread of all species inhabiting all of the world's continents except Australia and Antarctica. Evidence of this is widespread with the existence of fossils from the European lion
European lion
European lion could be an extinct subspecies of lion that inhabited southern Europe until historic times. This population is generally considered part of the Asiatic lion , but others consider it a separate subspecies, the European lion...

, the cave lion
Panthera leo fossilis
Panthera leo fossilis, also known as the Early Middle Pleistocene European cave lion, is an extinct feline of the Pleistocene epoch. It is generally considered to be an early subspecies of the lion ....

, the Beringian cave lion and the American lion
American lion
The American lion — also known as the North American lion, Naegele’s giant jaguar or American cave lion — is an extinct lion of the family Felidae, endemic to North America during the Pleistocene epoch , existing for approximately...

.
Evidence of lions surviving Siberian winter temperatures can be found in the famous zoo of Novosibirsk
Novosibirsk
Novosibirsk is the third-largest city in Russia, after Moscow and Saint Petersburg, and the largest city of Siberia, with a population of 1,473,737 . It is the administrative center of Novosibirsk Oblast as well as of the Siberian Federal District...

, which has kept African lions since the 1950s in out-door all-year enclosures. This proves that the concept of introducing wild animals to different climates than their native range is possible.
Lions lived side by side with people for several millennia and it is only recently that many of them disappeared. The Romans and Greeks for instance reported the existence of lions in the Balkan mountains and northern Greece as recently as 100 AD. These dangerous but beautiful creatures roamed the northern grasslands of Russia with other large species of animals, some of which survive today, and many that sadly do not, such as Moose
Moose
The moose or Eurasian elk is the largest extant species in the deer family. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a dendritic configuration...

, reindeer
Reindeer
The reindeer , also known as the caribou in North America, is a deer from the Arctic and Subarctic, including both resident and migratory populations. While overall widespread and numerous, some of its subspecies are rare and one has already gone extinct.Reindeer vary considerably in color and size...

, cave bear
Cave Bear
The cave bear was a species of bear that lived in Europe during the Pleistocene and became extinct at the beginning of the Last Glacial Maximum about 27,500 years ago....

, cave hyena
Cave Hyena
The Cave Hyena is an extinct subspecies of spotted hyena native to Eurasia, ranging from Northern China to Spain and into the British Isles...

, siberian roe deer
Siberian Roe Deer
Capreolus pygargus, also known as the Siberian roe deer or eastern roe deer, is a species of roe deer found in northeastern Asia. In addition to Siberia and Mongolia, it is found in Kazakhstan, the Tian Shan Mountains, Eastern Tibet, the Korean peninsula, and northeastern China...

, woolly rhinoceros
Woolly Rhinoceros
The woolly rhinoceros is an extinct species of rhinoceros that was common throughout Europe and Asia during the Pleistocene epoch and survived the last glacial period. The genus name Coelodonta means "cavity tooth"...

, siberian tiger, Homotherium
Homotherium
Homotherium is an extinct genus of machairodontine saber-toothed cats, often termed scimitar cats, endemic to North America, South America, Europe, Asia, and Africa during the Pliocene and Pleistocene epochs , existing for approximately .It first became extinct in Africa some 1.5 million years ago...

, steppe wisent
Steppe Wisent
The Steppe Bison or steppe wisent was a bison found on steppes throughout Europe, Central Asia, Beringia, and North America during the Quaternary...

, irish elk
Irish Elk
The Irish Elk or Giant Deer , was a species of Megaloceros and one of the largest deer that ever lived. Its range extended across Eurasia, from Ireland to east of Lake Baikal, during the Late Pleistocene. The latest known remains of the species have been carbon dated to about 7,700 years ago...

, saiga antelope
Saiga Antelope
The saiga is a Critically Endangered antelope which originally inhabited a vast area of the Eurasian steppe zone from the foothills of the Carpathians and Caucasus into Dzungaria and Mongolia. They also lived in North America during the Pleistocene...

, muskox, Elasmotherium
Elasmotherium
Elasmotherium is an extinct genus of giant rhinoceros endemic to Eurasia during the Late Pliocene through the Pleistocene, documented from 2.6 mya to as late as 50,000 years ago, possibly later, in the Late Pleistocene, an approximate span of slightly less than 2.6 million years. Three species...

, yak
Yak
The yak, Bos grunniens or Bos mutus, is a long-haired bovine found throughout the Himalayan region of south Central Asia, the Tibetan Plateau and as far north as Mongolia and Russia. In addition to a large domestic population, there is a small, vulnerable wild yak population...

, woolly mammoth
Woolly mammoth
The woolly mammoth , also called the tundra mammoth, is a species of mammoth. This animal is known from bones and frozen carcasses from northern North America and northern Eurasia with the best preserved carcasses in Siberia...

, snow sheep
Snow sheep
The snow sheep , or Siberian bighorn sheep, is a species of sheep, which comes from the mountainous areas in the northeast of Siberia. One subspecies, the Putorana Snow Sheep lives isolated from the other forms in the Putoran mountains...

, wolverine
Wolverine
The wolverine, pronounced , Gulo gulo , also referred to as glutton, carcajou, skunk bear, or quickhatch, is the largest land-dwelling species of the family Mustelidae . It is a stocky and muscular carnivore, more closely resembling a small bear than other mustelids...

, Eurasian lynx
Eurasian Lynx
The Eurasian lynx is a medium-sized cat native to European and Siberian forests, South Asia and East Asia. It is also known as the European lynx, common lynx, the northern lynx, and the Siberian or Russian lynx...

 and all the other smaller animals which in total comprise the massive richness of Siberian biodiversity.

The ideas are not however entirely restricted to existing megafauna. There are hopes that one day cloning technology will be advanced enough to recreate a woolly mammoth
Woolly mammoth
The woolly mammoth , also called the tundra mammoth, is a species of mammoth. This animal is known from bones and frozen carcasses from northern North America and northern Eurasia with the best preserved carcasses in Siberia...

, a species which became extinct at the end of the last ice age. Recent evidence however suggests that they may have survived into the Holocene
Holocene
The Holocene is a geological epoch which began at the end of the Pleistocene and continues to the present. The Holocene is part of the Quaternary period. Its name comes from the Greek words and , meaning "entirely recent"...

 with isolated populations of dwarfed individuals surviving on remote islands in the arctic circle such as St. Paul's island and Wrangel island
Wrangel Island
Wrangel Island is an island in the Arctic Ocean, between the Chukchi Sea and East Siberian Sea. Wrangel Island lies astride the 180° meridian. The International Date Line is displaced eastwards at this latitude to avoid the island as well as the Chukchi Peninsula on the Russian mainland...

, both of which are situated very close to the location of Pleistocene Park. Evidence points out that these populations could have existed as recently as 1700 BC.

Size and administration

Pleistocene Park is a 160 km2 scientific nature reserve
Nature reserve
A nature reserve is a protected area of importance for wildlife, flora, fauna or features of geological or other special interest, which is reserved and managed for conservation and to provide special opportunities for study or research...

 (zakaznik
Zakaznik
Zakaznik is a type of protected area in Russia and other former Soviet republics such as Ukraine that meets World Conservation Union's category III, or more frequently category VII criteria....

), owned and administered by a non-profit corporation, Pleistocene Park Association, consisting of the ecologists from the Northeast Science Station in Chersky and the Grassland Institute in Yakutsk
Yakutsk
With a subarctic climate , Yakutsk is the coldest city, though not the coldest inhabited place, on Earth. Average monthly temperatures range from in July to in January. The coldest temperatures ever recorded on the planet outside Antarctica occurred in the basin of the Yana River to the northeast...

. The reserve is surrounded by a 600 km2 buffer zone that will be added to the park by the regional government, once the animals have successfully established themselves.

Animals

Animals already present in the park:

Carnivores:
Eurasian Lynx
Eurasian Lynx
The Eurasian lynx is a medium-sized cat native to European and Siberian forests, South Asia and East Asia. It is also known as the European lynx, common lynx, the northern lynx, and the Siberian or Russian lynx...

,
Grey Wolf,
Arctic Fox
Arctic fox
The arctic fox , also known as the white fox, polar fox or snow fox, is a small fox native to Arctic regions of the Northern Hemisphere and is common throughout the Arctic tundra biome. The Greek word alopex, means a fox and Vulpes is the Latin version...

,
Eurasian Brown Bear
Eurasian Brown Bear
The Eurasian brown bear is a subspecies of brown bear, found across northern Eurasia. The Eurasian brown bear is also known as the common brown bear, European brown bear and colloquially by many other names....

,
Wolverine
Wolverine
The wolverine, pronounced , Gulo gulo , also referred to as glutton, carcajou, skunk bear, or quickhatch, is the largest land-dwelling species of the family Mustelidae . It is a stocky and muscular carnivore, more closely resembling a small bear than other mustelids...

,
Red Fox
Red Fox
The red fox is the largest of the true foxes, as well as being the most geographically spread member of the Carnivora, being distributed across the entire northern hemisphere from the Arctic Circle to North Africa, Central America, and the steppes of Asia...

,

Herbivores:
Reindeer
Reindeer
The reindeer , also known as the caribou in North America, is a deer from the Arctic and Subarctic, including both resident and migratory populations. While overall widespread and numerous, some of its subspecies are rare and one has already gone extinct.Reindeer vary considerably in color and size...

,
Elk
Elk
The Elk is the large deer, also called Cervus canadensis or wapiti, of North America and eastern Asia.Elk may also refer to:Other antlered mammals:...

,
European Bison,
Moose
Moose
The moose or Eurasian elk is the largest extant species in the deer family. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a dendritic configuration...

,
Yakutian horse
Yakutian horse
The Yakutian horse , sometimes called the Yakut horse, Yakut pony or simply the Yakut, is a rare native horse breed from the Siberian Sakha Republic region. It is large compared to the otherwise similar Mongolian horse and Przewalski's horse breeds...

,
Muskox

Animals considered or suggested for reintroduction:

Carnivores:
Amur Leopard
Amur Leopard
The Amur leopard , also known as the Far Eastern leopard, Korean leopard, and Manchurian leopard is one of nine recognised subspecies of leopard. It is a wild feline predator native to the mountainous areas of the Russian Far East. It used to inhabit the forests of Korea and China, but it has...

,
Siberian Tiger,
Asiatic Lion
Asiatic Lion
The Asiatic lion also known as the Indian lion, Persian lion and Eurasian Lion is a subspecies of lion. The only place in the wild where the lion is found is in the Gir Forest of Gujarat, India...



Herbivores:
Yak
Yak
The yak, Bos grunniens or Bos mutus, is a long-haired bovine found throughout the Himalayan region of south Central Asia, the Tibetan Plateau and as far north as Mongolia and Russia. In addition to a large domestic population, there is a small, vulnerable wild yak population...

,
Snow Sheep
Snow sheep
The snow sheep , or Siberian bighorn sheep, is a species of sheep, which comes from the mountainous areas in the northeast of Siberia. One subspecies, the Putorana Snow Sheep lives isolated from the other forms in the Putoran mountains...

,
Saiga antelope
Saiga Antelope
The saiga is a Critically Endangered antelope which originally inhabited a vast area of the Eurasian steppe zone from the foothills of the Carpathians and Caucasus into Dzungaria and Mongolia. They also lived in North America during the Pleistocene...

,
Bactrian Camel
Bactrian camel
The Bactrian camel is a large, even-toed ungulate native to the steppes of central Asia. It is presently restricted in the wild to remote regions of the Gobi and Taklamakan Deserts of Mongolia and Xinjiang. A small number of wild Bactrian camels still roam the Mangystau Province of southwest...

,
Siberian Roe Deer
Siberian Roe Deer
Capreolus pygargus, also known as the Siberian roe deer or eastern roe deer, is a species of roe deer found in northeastern Asia. In addition to Siberia and Mongolia, it is found in Kazakhstan, the Tian Shan Mountains, Eastern Tibet, the Korean peninsula, and northeastern China...

,
Woolly Mammoth
Woolly mammoth
The woolly mammoth , also called the tundra mammoth, is a species of mammoth. This animal is known from bones and frozen carcasses from northern North America and northern Eurasia with the best preserved carcasses in Siberia...

.

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    Pig
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    The burro is a small donkey used primarily as a pack animal. In addition, significant numbers of feral burros live in the Southwestern United States, where they are protected by law, and in Mexico...

    , Mustang
    Mustang (horse)
    A Mustang is a free-roaming horse of the North American west that first descended from horses brought to the Americas by the Spanish. Mustangs are often referred to as wild horses, but there is intense debate over terminology...

    ), camelids (Dromedary
    Dromedary
    The dromedary or Arabian camel is a large, even-toed ungulate with one hump on its back. Its native range is unclear, but it was probably the Arabian Peninsula. The domesticated form occurs widely in North Africa and the Middle East...

    , Bactrian Camel
    Bactrian camel
    The Bactrian camel is a large, even-toed ungulate native to the steppes of central Asia. It is presently restricted in the wild to remote regions of the Gobi and Taklamakan Deserts of Mongolia and Xinjiang. A small number of wild Bactrian camels still roam the Mangystau Province of southwest...

    , Guanaco, Vicuna
    Vicuña
    The vicuña or vicugna is one of two wild South American camelids, along with the guanaco, which live in the high alpine areas of the Andes. It is a relative of the llama, and is now believed to share a wild ancestor with domesticated alpacas, which are raised for their fibre...

    ), Cheetahs, Lions, Saiga Antelope
    Saiga Antelope
    The saiga is a Critically Endangered antelope which originally inhabited a vast area of the Eurasian steppe zone from the foothills of the Carpathians and Caucasus into Dzungaria and Mongolia. They also lived in North America during the Pleistocene...

    , Mountain Tapir
    Mountain Tapir
    The Mountain Tapir or Woolly Tapir is the smallest of the four species of tapir and is the only one to live outside of tropical rainforests in the wild...

    , Asian Elephant
    Asian Elephant
    The Asian or Asiatic elephant is the only living species of the genus Elephas and distributed in Southeast Asia from India in the west to Borneo in the east. Three subspecies are recognized — Elephas maximus maximus from Sri Lanka, the Indian elephant or E. m. indicus from mainland Asia, and E. m....

    , and African Elephant.
  • Rewilding Europe
    Europe
    Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

     was never put into order, but it is possible as Europe had large amounts of megafauna during the Pleistocene. Creatures like rhinoceroses, elephants, hippopotamus
    Hippopotamus
    The hippopotamus , or hippo, from the ancient Greek for "river horse" , is a large, mostly herbivorous mammal in sub-Saharan Africa, and one of only two extant species in the family Hippopotamidae After the elephant and rhinoceros, the hippopotamus is the third largest land mammal and the heaviest...

    , lions, leopard
    Leopard
    The leopard , Panthera pardus, is a member of the Felidae family and the smallest of the four "big cats" in the genus Panthera, the other three being the tiger, lion, and jaguar. The leopard was once distributed across eastern and southern Asia and Africa, from Siberia to South Africa, but its...

    s, and hyenas could be introduced, along with expanding populations of musk oxen, reindeer
    Reindeer
    The reindeer , also known as the caribou in North America, is a deer from the Arctic and Subarctic, including both resident and migratory populations. While overall widespread and numerous, some of its subspecies are rare and one has already gone extinct.Reindeer vary considerably in color and size...

    , bison
    Bison
    Members of the genus Bison are large, even-toed ungulates within the subfamily Bovinae. Two extant and four extinct species are recognized...

    , and brown bear
    Brown Bear
    The brown bear is a large bear distributed across much of northern Eurasia and North America. It can weigh from and its largest subspecies, the Kodiak Bear, rivals the polar bear as the largest member of the bear family and as the largest land-based predator.There are several recognized...

    .

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