Since being brought to Arizona in 1906, the bison population has steadily grown to reach more than 600. Experts say the herd is living on land not designed to sustain it, and adverse ecological effects are already being seen in the surrounding area.
Since being brought to Arizona in 1906, the bison population has steadily grown to reach more than 600. Experts say the herd is living on land not designed to sustain it, and adverse ecological effects are already being seen in the surrounding area.
