JOG.....Grizzly and Brown Bear are one in the same specie! This was proven some years ago by a (biologist) man who devoted his entire life and almost died from a grizzly attack in 1978 while studying them in Yellow Stone National Park. I just happened to be there that year. They also had 3 people killed by bears in that park that year.
Those so called Brown Bears just have much more food and don't have to travel but a city block or so to satisfy their hunger, while the mountain grizzly will travel 20 miles in a given day just hunting for his food.
