The great biological wipe

The great biological wipe, also known as the Everett Plague, is an ongoing environmental disaster that has obliterated approximately 10,000 square miles of native Raanic flora and fauna. It's said to have started before the Severance, caused by reckless plantation of various trees and vegetation from Earth, and then later greatly enhanced by several post-severance events, such as the destruction of zoos and research facilities.

Earth vs. Raana

After a few years of settlement, it became clear that common flora from Earth was vastly more dominant than Raanic vegetation. Planting trees in a newly formed park would eradicate almost all indigenous flora within ten years, save for hardy specimens such as dungah moss and haaltrees.

The almost complete lack of ornithic creatures gave the 250,000 birds released from the aviarium in Whitehaven, two years after the Severance, a brand-new world to conquer. Today, over 100 million birds, all native to Earth, call this planet their home. Their introduction to the biosphere of Raana has caused a massive environmental change for the entire Irendorian continent, all while oaks, ferns, pines and birch trees eat up approximately 10 square kilometers of Raanic jungles each year.