Verified answer

Seems reasonable. It meets the criteria for being considered for listing under the Endangered Species Act.

http://en.wikipedia.org/wiki/Endangered_Species_Ac...

Technically the main culprit are pine beetles, which are becoming more prevalent as winters become warmer, and more survive due to fewer cold snaps.

It sounds as though grizzlies might qualify as a threatened species as well.

They aren't endangered by warming IMO. They are probably endangered by poor management. Fires naturally weed out unhealthy trees and brush about every decade. Humans have interfered with the cycle of fire by fighting the fires. Consequently the forests have become riddled with diseased trees and underbrush. This has opened the door pine beetles. I suspect this is the actual cause. I have seen pine beetle infestations in the Black Hills and these pine beetles were doing perfectly well and survived very cold winters. I think it is just convenient for alarmists to assign blame. Serial abusing the Endangered Species Act isn't the solution. Proper forest management is. This includes either periodic burning (preferred) or very intensive clearing.

No.

There are so many other factors to consider that listing the main culprit as man-made global warming would be stupid in the extreme. (grasping blindly at things that are unpleasant that could be loosely blamed on global warming.)

Lack of fire and transportation of wood are two much more likely factors. (the beetles were already there, they just spread faster.)