The great plains in America have now expanded and have reached parts further north, covering much of what was Canadian territory to a large extent. Some animals are quite familiar, however, these belong to new species that replaced their ancestors when minor but abrupt changes in the climate led to the extinction of certain species. The Prairie buffalo (Seismotaurus sp.) are one of the dominant herbivores of the continent, being the continuation of the giants bovids that once thrived during the ice ages like the bison and their ancestors introduced by humans, the Bos taurus. Some carnivores have remained unchanged in form, although over time new species and genera emerged, such as the Therocanis, one of the several descendants of wolves and dogs that have grown in comparison to their predecessors, and the small Ashen Fox (Vulpex cinerus), a minor carnivore of the prairies that despite not having a prominent role as an alpha predator is still interesting. A lonely male Therocanis had the misfortune to meet an angry male, so he has to flee quickly before the great herbivore manages to catch up. Around all of them, many of the now common Woolly Chested Elk (Macrocervus velli) congregate in small groups which they graze during the summer, and in winter they take shelter in the forests.
This is only a small portrait of what represents the daily life of the inhabitants of the early days of the Lethargocene epoch, 12 million years after our time and just 4 million years since the end of the Holocene. The world during this time has entered in a period of stability after millions of years of minor but circumstantial changes in the climate, the geography and biodiversity, being the major event that drives the world on this situation the end of the major glaciar period just 7 to 8 million years after us.
The fauna around the world is a rare combination of survivors, invaders, reintroduced and new varieties of species, this because of the anthropogenic interactions and migrations during the human age, despite having passed more than 12 million years, some animals introduced in certain territories maintained and prospered alongside the natives, as well as certain species that had been saved by humans at the end of its era on earth. The emergence of new varieties of animals was due to the end of the glacial cycles of the Holocene, with the recoil of ice, a considerable amount of large fauna perished, together with subsequent exchanges between continents.
North America is a continent dominated largely by great herbivores like the bovids, new varieties of cervids, swine, pronghorns and equines that proliferated in the last 4 million years across the continent, although equines were reduced with the emergence of large forests. Among the dominant carnivores are the canids, felines and some terrestrial crocodiles in the south. Some of the last and largest known bears inhabit the north and central parts of the continents, being mostly herbivorous, being replaced to a great extent by procyonids as the main omnivores. There are some rarities that came from South America, such as primate populations, tapirs, armadillos, among others that have adapted and are now part of the mega and meso fauna.
On Greenland, the territory is large enough and with sufficient isolation time to create a different variety of fauna, including medium-sized bovids, tall deer, large felines descended from lynx, glutton-sized mustelids who have taken the place of bears, huge pigs and a variety of terrestrial birds and reptiles resistant to cold temperatures; The peninsula of Baja California had separated several million years ago from the main continent forming a new isolated island, so it is now the permanent environment of an interesting variety of mammals, birds and reptiles, including small goats, huge and heavy lagomorphs, carnivorous roadrunners, heavy lizards and one of the last true bears; In the Antilles, rodents are prominent mammals, however, these islands as a whole maintain a much higher variety of reptiles and birds like huge herbivorous iguanas, small terrestrial caimans, large agamids, birds of prey, etc.
South America after having experienced the largest wildlife exchange in its existence and now again isolated has kept an interesting mosaic of fauna product of this event, being the predominant herbivores the ungulates like deer, camelids and bovids without the Notoungulates, although that the perissodactyls like the horses and especially tapirs are still around. The main predators are formed by felines, although these are new varieties descendant from minor species like ocelots or domestic cats, some medium size didelphids, peccaries and even some bird species. Armadillos have begun to take a role in the megafauna, however, some are taking different roles apart from being herbivorous there are also omnivorous and even carnivorous forms.
Iceland since the last ice age became almost a virgin land, only being populated by two species of mammals, and the rest of the recent colonizers birds. Foxes have taken the main carnivore niches and the arctic hare descendants are large and medium sized grazers. Ptarmigan and Anseriformes are the recent herbivore birds of the region and falcons and owls have been established as the main avian predators.
Europe has undergone a series of changes in the zoogeography since the end of the ice ages with the disappearance of the Mediterranean Sea, being part of a slight interchange of several species coming from the north of Africa, although the Sahara and the great plateau of the Mediterranean have provided a huge natural barrier to further migration. The predominant megafauna is formed by large and medium sized bovids, deer, horses, suids, canids, etc. but also have proliferated new generations of large felines descended from cats and lynx, large mustelids that have taken the role of bears, and some terrestrial primates migrants of Africa have been established in the west.
Africa has undergone major transformations with the split of its eastern territory and the union of the north with Europe. Species of hogs, antelopes and buffaloes and the few remains of the giraffid are the largest herbivores now duet to the extinction of the last mega mammals in the continent. There are still large carnivores such as lions, hyenas, cheetahs and leopards; however, they have diversified into new varieties.
Aaru is the new subcontinent created by the rift valley, is the last bastion of most African native megafauna, having some of the last relics of pre-glacial periods that have now disappeared around the world even like the last species of African elephants, rhinos, and others, but most of them being reduced in size. The dominant carnivores of the region are mainly a mixture of large cats, canids and apes.
Madagascar has recovered from the great loss of diversity of fauna which had suffered since the Pleistocene. In the area of the megafauna new and great lemurs have emerged, fossa and rodents, but also there has been a resurgence of the great avifauna after millions of years, these came from pigeons, cuckoos and passerines.
Asia maintains a huge mosaic of different environments, divided by great geological barriers and the great immensity of the continent: Middle East still remains as a deserted area, its territory has gradually increased in some parts due to the collision of the plates, added to that some of the nearby bodies of water have eventually disappeared like the red sea and the ; Western and Central Asia has presented a slight change in the distribution of the flora, being forests of conifers more common but still being the predominant prairies; The Arctic/Siberian region is much warmer, the taiga has been reduced and now is covered by large amount of forests and with short and warm winters with few snow covering; India, East Asia, Japan and The southeast regions (formed by Sundaland, Wallacea, Philippines and many other islands near) still have a relative climate as in the early Quaternary, but have lost much of their iconic fauna, leaving few survivors like the elephants, tapirs and orangutans among others.
As in most of the world, large artiodactyls such as large bovines, camelids, deer, antelopes are the predominant large herbivores, along with carnivorous such as large canids and felids. Due to the fragmentation of the environments and the large size, there is an enormous diversity of species adapted to their respective territories.
Australia and its unique fauna and environments suffered a great loss during the Pleistocene and Holocene, and still recovering from it, marsupials now have competition from placentas such as camels, buffaloes, rodents and canids that were once brought by humans and thrived. But even in these circumstances, Marsupials still remain as the predominant group in the continent, being Dasyurids common medium sized carnivores, bandicoots have begun to diversify into new varieties of large omnivores, and macropods and wombats are still the common herbivores. New Guinea Has not underwent major changes other than the migration of some new varieties of animals from Australia.
Most of the rest of pacific islands like Hawaii and Galapagos To this point have largely eroded, and been replaced by other new islands that were formed by the eruption of hot spots that once formed them, being colonized eventually by new waves of animals, especially birds, some crocodilians, testudines’ and squamates species and bats.
New Zealand is one of the regions that has undergone most changes, having lost much of the native birdlife and is now the residence of a variety of invaders, being some of the permanent colonizers large herbivores like goats and horses and also some small mammals like possums, hares and bats, and the few birds like the magpies and Canadian geese. Much of the native avifauna was transformed due to this sudden migration, the majority being extinct, and others adapting to the new number of competitors, few species like the keas became some of the predominant carnivorous birds.
Antarctica has lost a good part of the ice sheet that once covered its coastal terrain and has resulted in formation of tundra, composed partly of mosses, lichens and bryophytes, sustains a basic terrestrial food chain, being the first residents in colonizing these territories several types of birds from South America and some species Australia and New Zealand.
Well, officially starts TFiF, welcome to the future
Still, what happened to Humanity? Did they move off of the Earth at some point?
All the things I have shown are part of the story, however I was not writing the story properly with a (beginning and end) I just threw concept by concept.