Before the European invasion, bison ranged from Maine to Florida and Texas to Alberta. We don't know their numbers. Before the invasion, forest cover was kept d

Before the European invasion, bison ranged from Maine to Florida and Texas to Alberta. We don't know their numbers. Before the invasion, forest cover was kept down across much of the continent by regular burns. After the pandemics were seeded, the burns ceased, and the massive uptake of carbon regrowing the forests caused what is often called a "little ice age". The new forest cover did not favor bison. We don't know the historical range of Na-Dene or Lakota, or other modern nations; we know only where they were centuries after the aforementioned pandemics wiped out a large majority of all populations across two continents. The current Pueblo habit of adobe dwellings is suited to their now-confined range. One may reasonably doubt those living in wetter climates used them.