Great American Biotic Interchange
Due to continuous tectonic plate movement, the world is always changing right under our feet. Around 3 million years ago, volcanic activity caused the Isthmus of Panama to rise from the seafloor and bridge the gap between North and South America.
This land bridge made it possible for terrestrial and fresh water fauna to migrate between the territories, distributing mammals, flightless birds, reptiles, amphibians, and arthropods. Phorusrhacos used this into the new world and over time gave way to the largest species of Terror Bird, Titanis walleri.





