Dinosaur Island

The Arapaho Island is a large island that is about 5 times bigger than Madagascar. It was first formed by an undersea volcano, which erupted and made a large island around 310 million years ago that later became Arapaho Island. This island is also known for its collection of prehistoric animals, with most prehistoric animals living on the island being herbivores (plant eaters), they either survived extinctions and are always native to the island or were brought back and were introduced to the island after genetic engineering by ancient aliens (since these aliens hoped that these animals will thrive and live on once again).

The Landscape
Northern Isle - The northern part of the island, being dominated by rainforests and scrublands.

Eastern Isle - The eastern part of the island, dominanting by mixed forests and grasslands.

Western Isle - The western part of the island, dominated by wetlands, savannas and woodlands.

Southern Isle - The southern part of the island, dominated by jungles and grasslands than most parts of the island.

Animals

 * Gray Wolf - A large canid native to North America, Europe and Asia, but they were introduced to the island and flourished. Living and hunted in packs to hunt down prey. Despite competition, they're thriving very well.
 * Moose - The largest deer native to mainland North America and Europe, but they were introtduced to the island, where they flourished and breeding well. They evolved to live and travel in large herds due to many predators in their new environment.
 * Plains Bison - A large bovid that is native to mainland North America, but they were introduced to the island and became overabudant. They lived in large herds and are common across the grasslands and often migrate with other animals to search for new feeding grounds.
 * Zebuffalo - A massive species of bovid (a descendant of genetically-engineering hybrids of bovids such as plains bison, gaur and longhorn. They lived in large herds. They often migrate with plains bison herds to search for new feeding grounds.
 * Macaw - Various species of macaws, they have been introduced to Arapaho Island from mainland South America to conserve native species, saving them from extinction even if ones in native ranges become extinct.
 * Zarander - A very large herbivorous elephant-like pig that is related to Europe's wild boars, they are also one of the largest land mammals on earth, about half the size of an Asian elephant and lived in herds.
 * Zebra - An equine native to mainland Africa, but they were introduced to the island. Living in herds, they are common in the grasslands and sometimes migrate with other animals.
 * Quagga - A subspecies of plains zebra that went extinct in 1883, but they were later cloned and released to the island by ancient aliens. They lived in large herds and are common across the open grasslands of the island.
 * Carakiller - one of the last birds other than occasional sea birds such as seagulls and others), it originated from The Future Is Wild universe. It lives and hunt in loose groups, mainly feeding on small dinosaurs, medium and small sized mammals. Despite competition, they're flourishing and thriving well.
 * Smilodon populator - Its ancestors escaped from cenozoic zoos. They lived in social prides similar role of lions and prey upon bison, horses and medium sized dinosaurs.
 * Giant Dhole - A descendant from several groups of dholes that larger than their ancestors and became more carnivorous. They became half the size of gray wolves.
 * Asian Elephant - A species of elephant native to mainland Asia, but they were introduced to the island and thriving well, making it the only non-local endangered species to be introduced to this island. They are preyed upon by smilodons, lions, gigabears and hyenas.
 * Rhabdodon - One of the most common non-avian dinosaurs of the island, is found frequently on forests and grasslands of the island.
 * Zuniceratops - A ceratopsian dinosaur that lived in the island and is about the size of a cow and lived in herds. They often migrate with zebuffalo or plains bison herds to search for new feeding grounds.
 * Tasmanian Pack Devil - A descendant of Tasmanian devils that were introduced in Arapaho Island. They evolved and became wolf-like built while living and hunting in packs to hunt prey, including medium sized dinosaurs.
 * Shagrat - A large sheep-size capybara-like marmot, living in herds while migrating due to a very rare snowy condition, it fills a similar niche to mainland musk oxen.
 * Ursine Hyena - A large bear-like hyena species that is native to the island. It hunts in packs to hunt down large prey like large mammals and dinosaurs like duckbills or giraffe beasts.
 * Gigantelope - A very large group of antelopes that fills a similar niche to mainland elephants, rhinos and hippos, but few subspecies lived in herds.
 * Dingo - A wild dog native to Australia, but they were recently introduced to the island and flourished. They compete with gray wolves and other predators for prey items.
 * Mexican Gigabear - The only bear species of the island, it is closely related to the mainland's black bear, but more short-faced bear-like and is the world's largest bear of the island, it feeds on medium to large sized mammals to medium sized dinosaurs.
 * Bittle - A descendant of the feral cattle that lived in the island and has a similar niche of mainland bisons, gaurs, yaks, bantengs and water buffaloes. Living in large herds and are common across the grasslands.
 * Gaur - A large bovid that is native to Asia, but  but they were introduced to the island and became overabundant. They are common across the jungles and grasslands of the island. They often migrate with bison herds to search for new feeding ground.
 * Girelephant - A species of elephant thatthat is native to this island. They are named because their skin resembles a giraffe's fur coloration. They lived in large herds across the grasslands of the island.
 * Nuevapuma - One of the only native big cats on the island, it has a similar niche to mainland cougars, jaguars, and leopards. It preys upon deer, pigs, flighltess birds, tapirs and small to medium sized dinosaurs.
 * ​​African Lion - A species of big cat that is native to mainland Africa, but they were introduced to the island and became one of the apex predators of Arapaho Island.
 * Pocavu Dog - A species of wild dog that is created through genetically engineering. It lives and hunted in packs. It has a niche similar to gray wolves, dholes, African wild dogs and dingoes.
 * Telmatosaurus - one of the only known species of hadrosaur of the Hațeg Island, but they were introduced to Arapaho island, it is also the smallest hadrosaur in the world. They lived in large herds and feeds on plants.
 * Javan rhinoceros - A species of critically endangered rhinoceros that was introduced to the island in 1901 to preserve this species. It is also one of the only non-local endangered species introduced to Arapaho Island.
 * Eastern black rhinoceros - A species of rhinoceros that is critically endangered in its native range, but was introduced to the island in 1929, to preserve this species is flourishing and breeding. It is also one of the only non-local endangered species introduced to Arapaho Island.
 * Northern white rhinoceros - a species of large rhinoceros that was once native to Africa before it was made extinct there, but was introduced to Arapaho Island in 1930s, where they are flourishing and breeding well without having to worry about any poachers, in case if that happened. It is also one of the only non-local endangered species introduced to the island.​​​​​​
 * Pulornchin - a giant rhinoceros-sized herbivorous rodent native to Hațeg Island, but they were introduced to Arapaho Island. It is the true largest rodent on earth, being much bigger than the mainland capybara, in which is closely related to. It is mainly found in grasslands and swamps of the island.
 * Macrauchenia - An ancient animal that lived in South America 1 million years ago but now they live on the island's grasslands. They are found in large herds.
 * Thylacine - One of the largest carnivorous modern marsupials of Future Island and the second largest of Australia and Tasmania (second only to the marsupial lion), it is now introduced to Arapaho Island and flourished well,
 * Sabretooth Tiger - A subspecies of Javan tiger that grew 5 ft. longer and has saber teeth. They are common in the jungles and grasslands, filling a niche similar to mainland tigers.
 * African Wild Dog - A wild dog native to Africa, but were introduced to the island in 1920s by aliens, where they are flourishing and breeding well. Despite competition, they're still thriving. It is also one of the only non-local endangered species introduced to the island.​​​​​​
 * Chilotherium - A a hornless rhinoceros endemic to Eurasia from the Miocene to the Pliocene. It is distinguished by its two tusks located on its lower jaw and lives in herds. But they're now native to the island.
 * Gazellox - A large, bison sized antelope that is native to the island. They lived in large herds up to thousands and often migrate to search for new feeding grounds.
 * Eastern Duckbill - An ornithopod dinosaur that lived in the island, it is descended from a group of Charonosaurus that survived and flourished well. They across the grasslands, forests and swamps of the island in herds.
 * Andrewsarchus - The most largest carnivore of Arapaho Island. They were brought to the island due to zoo escapees, they have established their population in eastern parts of the island. They occasionally prey upon bison and other medium sized herbivores.
 * Magyarosaurus - One of the smallest native sauropod species introduced to Arapaho Island and became overabudant. They are common in the jungles and grasslands of the island.
 * Propaleotherium - A tiny relative of a horse that is about the size of a cat and sometimes can be kept as pets, they live in tropical forests close to the grasslands and swamps. Their main season they lived in group due to many predators like bobcats, wolves, giant birds, dholes, dingoes and jaguars.
 * Bovinedeer - A descendant of a feral population of elks that were introduced to the island. They are now bulky herbivores that are mainly grazers, therefore, feeding on grass. They have filled the niche similar to mainland bison. Living in huge herds across the island's grasslands.
 * Giraffe - A member of the giraffe family native to mainland Africa, but was introduced to the island in 1920s, to preserve this species is flourishing and breeding. It is also one of the only non-local endangered species introduced to Arapaho Island.
 * Southern Duckbill - Another ornithopod dinosaur that is native to the island, it is descended from group of Saurolophus that survived and flourished well. They are common across the grasslands.
 * Pygmy Giraffe Beast - A sauropod dinosaur that is descended from Ampelosaurus that became native of the island and lived in woodlands and grasslands in herds. They sometimes migrate with herds of plains bison and zebuffaloes to search for new feeding grounds.
 * Okapi - A relative of the giraffe that is native to Africa, but they were introduced to the island, where they're flourishing and breeding well, making it one of the non-local endangered species introduced to the island. Unlike their ancestors, they evolved to live and travel in herds. It has zebra-like stripes on their backs. Their appearances resemble that of a current antelope called the bongo.
 * Macawnivore - A genetically-engineered hybrid between a modern tiger, a macaw, a warthog, and an extinct smilodon, it is important as it helps control the population of native bison, zebuffaloes, gaurs, triceratops, pachyrhinosaurus, hadrosaurs and other large herbivores. It is illegal to hunt Macawnivores for their tusks.
 * Ambulocetus - A very primitive whale that resembles a sort of mammalian crocodile. It is a carnivore that hunts fish, seals, tapirs, wild pigs, capybaras and small to medium sized dinosaurs.