New Pleistocene
This page is a part of New Pleistocene, a collaborative project detailing the fauna of the next glacial period.
Woolly mammoth

The Second American Interchange is an event that took place in North, Central and South America during the global warming period that took place during the late Holocene. The vast expansion of the polar ice caps allowed animals from North and South America to migrate to the former or ladder continent.

Immigrants of North AmericaEdit

  • New World monkeys migrated to North American forests and a few species still manage to persist.
  • Parrots migrated to drier or more temperate parts of North America.
  • Peccaries managed to get as far as California, where they inhabit the many parts of western North America, they have had trouble moving up North largely because of competition with wild/feral boar descendants.
  • New World camelids started to migrate up relatively early in the New Pleistocene and formed multiple species.
  • Anteaters managed to get as far as California and Florida, but are relatively diverse.
  • Three species of tapirs (all descended form the last tapir species, the Brazilian tapir) have evolved in Florida, California and Texas.
  • The coati made it all the way up to former states like Maryland and New York, but went extinct almost everywhere else.
  • Capybaras migrated to North America, largely found in Ontario and Florida, though a sparse population in Maine and Québec.

Immigrants of South AmericaEdit

  • Prairie dogs migrated to South America relatively recently and formed a new species.
  • Pronghorns made it to Argentina and parts of Brazil.
  • American black bears were influenced to cross central America to South America because of their diversity and success in North America.
  • Beavers arrived relatively late during the interchange and only formed a few subspecies.
  • American bison were another late arrival, but formed one large species that is rather successful.

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