Yellowstone grizzly bears are an isolated population that is experiencing high levels of conflicts with people and is likely declining in the wake of the loss of whitebark pine, a critically important food source. Sylvia Fallon More Quotes by Sylvia Fallon More Quotes From Sylvia Fallon The Endangered Species Act has been tremendously successful at saving this population and preventing its demise, And retaining those valuable protections until the Yellowstone grizzly population is more robust and its future more certain is the best way to turn that past success into true recovery. Sylvia Fallon top-news Today's news provides a hopeful indication that we are helping them head in the right direction and curbing the loss of this magnificent butterfly. But we must be careful not to declare victory too soon. Sylvia Fallon environment