Big grizzlies trapped to try to snare answers to population puzzle

The kerchief over the bear's eyes protects it from dust and debris and reduces visual stimulation. The small tubing in its nose, known as a nasal cannula, delivers oxygen to the animal while it is tranquilized. It takes a trained team, a healthy dose of caution and about an hour of work to restrain a grizzly bear and get the samples needed for research on the iconic western species. This ...