 This disagreement impacts on the perceived global conservation status of these parrots.More detailed genetic analysis of the three taxa published in 2015 confirmed the distinctness of brown-necked and cape parrots, showing that ancestors of the two had diverged between 2.13 and 2.67 million years ago—in the late Pliocene to early Pleistocene epoch.This period was a period of changes in climate, where grassland and forest were expanding and contracting, which led to isolation and eventually speciation of separate populations.